diff --git a/example/example.cpp b/example/example.cpp
index 4b416cd7..01227247 100644
--- a/example/example.cpp
+++ b/example/example.cpp
@@ -7,6 +7,7 @@
 //
 //
 
+#include "spdlog/spdlog.h"
 #include "spdlog/logger.h"
 
 spdlog::logger *get_logger();
@@ -14,5 +15,5 @@ spdlog::logger *get_logger();
 int main(int, char *[])
 {    
     auto *l = get_logger();
-    l->info(L"HEllo {}", L"HGFS");
+    l->info("HEllo {}", "HG FS");
 }
\ No newline at end of file
diff --git a/include/spdlog/details/registry.h b/include/spdlog/details/registry.h
index 252f44df..7a1ad1f2 100644
--- a/include/spdlog/details/registry.h
+++ b/include/spdlog/details/registry.h
@@ -11,28 +11,20 @@
 // This class is thread safe
 
 #include "spdlog/common.h"
-#include "spdlog/details/periodic_worker.h"
-#include "spdlog/logger.h"
-#include "spdlog/details/pattern_formatter.h"
-
-#ifndef SPDLOG_DISABLE_DEFAULT_LOGGER
-// support for the default stdout color logger
-#ifdef _WIN32
-#include "spdlog/sinks/wincolor_sink.h"
-#else
-#include "spdlog/sinks/ansicolor_sink.h"
-#endif
-#endif // SPDLOG_DISABLE_DEFAULT_LOGGER
 
 #include <chrono>
 #include <functional>
 #include <memory>
 #include <string>
 #include <unordered_map>
+#include <mutex>
 
 namespace spdlog {
+class logger;
+
 namespace details {
 class thread_pool;
+class periodic_worker;
 
 class registry
 {
@@ -40,240 +32,67 @@ public:
     registry(const registry &) = delete;
     registry &operator=(const registry &) = delete;
 
-    void register_logger(std::shared_ptr<logger> new_logger)
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        register_logger_(std::move(new_logger));
-    }
-
-    void initialize_logger(std::shared_ptr<logger> new_logger)
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        new_logger->set_formatter(formatter_->clone());
-
-        if (err_handler_)
-        {
-            new_logger->set_error_handler(err_handler_);
-        }
-
-        new_logger->set_level(level_);
-        new_logger->flush_on(flush_level_);
-
-        if (automatic_registration_)
-        {
-            register_logger_(std::move(new_logger));
-        }
-    }
-
-    std::shared_ptr<logger> get(const std::string &logger_name)
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        auto found = loggers_.find(logger_name);
-        return found == loggers_.end() ? nullptr : found->second;
-    }
-
-    std::shared_ptr<logger> default_logger()
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        return default_logger_;
-    }
+    void register_logger(std::shared_ptr<logger> new_logger);    
+    void initialize_logger(std::shared_ptr<logger> new_logger);    
+    std::shared_ptr<logger> get(const std::string &logger_name);
+    
+    std::shared_ptr<logger> default_logger();
+    
 
     // Return raw ptr to the default logger.
     // To be used directly by the spdlog default api (e.g. spdlog::info)
     // This make the default API faster, but cannot be used concurrently with set_default_logger().
     // e.g do not call set_default_logger() from one thread while calling spdlog::info() from another.
-    logger *get_default_raw()
-    {
-        return default_logger_.get();
-    }
+    logger *get_default_raw();
+    
 
     // set default logger.
     // default logger is stored in default_logger_ (for faster retrieval) and in the loggers_ map.
-    void set_default_logger(std::shared_ptr<logger> new_default_logger)
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        // remove previous default logger from the map
-        if (default_logger_ != nullptr)
-        {
-            loggers_.erase(default_logger_->name());
-        }
-        if (new_default_logger != nullptr)
-        {
-            loggers_[new_default_logger->name()] = new_default_logger;
-        }
-        default_logger_ = std::move(new_default_logger);
-    }
-
-    void set_tp(std::shared_ptr<thread_pool> tp)
-    {
-        std::lock_guard<std::recursive_mutex> lock(tp_mutex_);
-        tp_ = std::move(tp);
-    }
-
-    std::shared_ptr<thread_pool> get_tp()
-    {
-        std::lock_guard<std::recursive_mutex> lock(tp_mutex_);
-        return tp_;
-    }
+    void set_default_logger(std::shared_ptr<logger> new_default_logger);
 
+    void set_tp(std::shared_ptr<thread_pool> tp);
+    
+    std::shared_ptr<thread_pool> get_tp();
+    
     // Set global formatter. Each sink in each logger will get a clone of this object
-    void set_formatter(std::unique_ptr<formatter> formatter)
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        formatter_ = std::move(formatter);
-        for (auto &l : loggers_)
-        {
-            l.second->set_formatter(formatter_->clone());
-        }
-    }
+    void set_formatter(std::unique_ptr<formatter> formatter);    
 
-    void set_level(level::level_enum log_level)
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        for (auto &l : loggers_)
-        {
-            l.second->set_level(log_level);
-        }
-        level_ = log_level;
-    }
-
-    void flush_on(level::level_enum log_level)
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        for (auto &l : loggers_)
-        {
-            l.second->flush_on(log_level);
-        }
-        flush_level_ = log_level;
-    }
-
-    void flush_every(std::chrono::seconds interval)
-    {
-        std::lock_guard<std::mutex> lock(flusher_mutex_);
-        std::function<void()> clbk = std::bind(&registry::flush_all, this);
-        periodic_flusher_ = details::make_unique<periodic_worker>(clbk, interval);
-    }
-
-    void set_error_handler(void (*handler)(const std::string &msg))
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        for (auto &l : loggers_)
-        {
-            l.second->set_error_handler(handler);
-        }
-        err_handler_ = handler;
-    }
-
-    void apply_all(const std::function<void(const std::shared_ptr<logger>)> &fun)
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        for (auto &l : loggers_)
-        {
-            fun(l.second);
-        }
-    }
-
-    void flush_all()
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        for (auto &l : loggers_)
-        {
-            l.second->flush();
-        }
-    }
-
-    void drop(const std::string &logger_name)
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        loggers_.erase(logger_name);
-        if (default_logger_ && default_logger_->name() == logger_name)
-        {
-            default_logger_.reset();
-        }
-    }
-
-    void drop_all()
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        loggers_.clear();
-        default_logger_.reset();
-    }
+    void set_level(level::level_enum log_level);
+    
+    void flush_on(level::level_enum log_level);
+    
+    void flush_every(std::chrono::seconds interval);
+    
+    void set_error_handler(void (*handler)(const std::string &msg));
+    
+    void apply_all(const std::function<void(const std::shared_ptr<logger>)> &fun);
+    
+    void flush_all();
+    
+    void drop(const std::string &logger_name);
+    
+    void drop_all();    
 
     // clean all resources and threads started by the registry
-    void shutdown()
-    {
-        {
-            std::lock_guard<std::mutex> lock(flusher_mutex_);
-            periodic_flusher_.reset();
-        }
+    void shutdown();    
 
-        drop_all();
-
-        {
-            std::lock_guard<std::recursive_mutex> lock(tp_mutex_);
-            tp_.reset();
-        }
-    }
-
-    std::recursive_mutex &tp_mutex()
-    {
-        return tp_mutex_;
-    }
-
-    void set_automatic_registration(bool automatic_regsistration)
-    {
-        std::lock_guard<std::mutex> lock(logger_map_mutex_);
-        automatic_registration_ = automatic_regsistration;
-    }
-
-    static registry &instance()
-    {
-        static registry s_instance;
-        return s_instance;
-    }
+    std::recursive_mutex &tp_mutex();    
+	
+    void set_automatic_registration(bool automatic_regsistration);
+    
+    static registry &instance();    
 
 private:
-    registry()
-        : formatter_(new pattern_formatter())
-    {
-
-#ifndef SPDLOG_DISABLE_DEFAULT_LOGGER
-        // create default logger (ansicolor_stdout_sink_mt or wincolor_stdout_sink_mt in windows).
-#ifdef _WIN32
-        auto color_sink = std::make_shared<sinks::wincolor_stdout_sink_mt>();
-#else
-        auto color_sink = std::make_shared<sinks::ansicolor_stdout_sink_mt>();
-#endif
-
-        const char *default_logger_name = "";
-        default_logger_ = std::make_shared<spdlog::logger>(default_logger_name, std::move(color_sink));
-        loggers_[default_logger_name] = default_logger_;
-
-#endif // SPDLOG_DISABLE_DEFAULT_LOGGER
-    }
-
+    registry();    
     ~registry() = default;
 
-    void throw_if_exists_(const std::string &logger_name)
-    {
-        if (loggers_.find(logger_name) != loggers_.end())
-        {
-            throw spdlog_ex("logger with name '" + logger_name + "' already exists");
-        }
-    }
-
-    void register_logger_(std::shared_ptr<logger> new_logger)
-    {
-        auto logger_name = new_logger->name();
-        throw_if_exists_(logger_name);
-        loggers_[logger_name] = std::move(new_logger);
-    }
-
+    void throw_if_exists_(const std::string &logger_name);    
+    void register_logger_(std::shared_ptr<logger> new_logger);    
     std::mutex logger_map_mutex_, flusher_mutex_;
     std::recursive_mutex tp_mutex_;
     std::unordered_map<std::string, std::shared_ptr<logger>> loggers_;
     std::unique_ptr<formatter> formatter_;
-    level::level_enum level_ = spdlog::logger::default_level();
+    level::level_enum level_ = level::info;
     level::level_enum flush_level_ = level::off;
     void (*err_handler_)(const std::string &msg);
     std::shared_ptr<thread_pool> tp_;
@@ -284,3 +103,7 @@ private:
 
 } // namespace details
 } // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "../src/registry.cpp"
+#endif // SPDLOG_HEADER_ONLY
diff --git a/include/spdlog/spdlog.h b/include/spdlog/spdlog.h
index a70a7aa7..cc4c8a47 100644
--- a/include/spdlog/spdlog.h
+++ b/include/spdlog/spdlog.h
@@ -11,6 +11,7 @@
 
 #include "spdlog/common.h"
 #include "spdlog/details/registry.h"
+#include "spdlog/details/pattern_formatter.h"
 #include "spdlog/logger.h"
 #include "spdlog/version.h"
 
diff --git a/src/registry.cpp b/src/registry.cpp
new file mode 100644
index 00000000..51f184ed
--- /dev/null
+++ b/src/registry.cpp
@@ -0,0 +1,259 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+#ifndef SPDLOG_HEADER_ONLY
+#include "spdlog/details/registry.h"
+#endif
+
+
+#include "spdlog/common.h"
+#include "spdlog/details/periodic_worker.h"
+#include "spdlog/logger.h"
+#include "spdlog/details/pattern_formatter.h"
+
+#ifndef SPDLOG_DISABLE_DEFAULT_LOGGER
+// support for the default stdout color logger
+#ifdef _WIN32
+#include "spdlog/sinks/wincolor_sink.h"
+#else
+#include "spdlog/sinks/ansicolor_sink.h"
+#endif
+#endif // SPDLOG_DISABLE_DEFAULT_LOGGER
+
+#include <chrono>
+#include <functional>
+#include <memory>
+#include <string>
+#include <unordered_map>
+
+namespace spdlog {
+namespace details {
+
+registry::registry()
+    : formatter_(new pattern_formatter())
+    , level_(spdlog::logger::default_level())
+{
+
+#ifndef SPDLOG_DISABLE_DEFAULT_LOGGER
+    // create default logger (ansicolor_stdout_sink_mt or wincolor_stdout_sink_mt in windows).
+#ifdef _WIN32
+    auto color_sink = std::make_shared<sinks::wincolor_stdout_sink_mt>();
+#else
+    auto color_sink = std::make_shared<sinks::ansicolor_stdout_sink_mt>();
+#endif
+
+    const char *default_logger_name = "";
+    default_logger_ = std::make_shared<spdlog::logger>(default_logger_name, std::move(color_sink));
+    loggers_[default_logger_name] = default_logger_;
+
+#endif // SPDLOG_DISABLE_DEFAULT_LOGGER
+}
+void registry::register_logger(std::shared_ptr<logger> new_logger)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    register_logger_(std::move(new_logger));
+}
+
+void registry::initialize_logger(std::shared_ptr<logger> new_logger)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    new_logger->set_formatter(formatter_->clone());
+
+    if (err_handler_)
+    {
+        new_logger->set_error_handler(err_handler_);
+    }
+
+    new_logger->set_level(level_);
+    new_logger->flush_on(flush_level_);
+
+    if (automatic_registration_)
+    {
+        register_logger_(std::move(new_logger));
+    }
+}
+
+std::shared_ptr<logger> registry::get(const std::string &logger_name)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    auto found = loggers_.find(logger_name);
+    return found == loggers_.end() ? nullptr : found->second;
+}
+
+std::shared_ptr<logger> registry::default_logger()
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    return default_logger_;
+}
+
+// Return raw ptr to the default logger.
+// To be used directly by the spdlog default api (e.g. spdlog::info)
+// This make the default API faster, but cannot be used concurrently with set_default_logger().
+// e.g do not call set_default_logger() from one thread while calling spdlog::info() from another.
+logger *registry::get_default_raw()
+{
+    return default_logger_.get();
+}
+
+// set default logger.
+// default logger is stored in default_logger_ (for faster retrieval) and in the loggers_ map.
+void registry::set_default_logger(std::shared_ptr<logger> new_default_logger)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    // remove previous default logger from the map
+    if (default_logger_ != nullptr)
+    {
+        loggers_.erase(default_logger_->name());
+    }
+    if (new_default_logger != nullptr)
+    {
+        loggers_[new_default_logger->name()] = new_default_logger;
+    }
+    default_logger_ = std::move(new_default_logger);
+}
+
+void registry::set_tp(std::shared_ptr<thread_pool> tp)
+{
+    std::lock_guard<std::recursive_mutex> lock(tp_mutex_);
+    tp_ = std::move(tp);
+}
+
+std::shared_ptr<thread_pool> registry::get_tp()
+{
+    std::lock_guard<std::recursive_mutex> lock(tp_mutex_);
+    return tp_;
+}
+
+// Set global formatter. Each sink in each logger will get a clone of this object
+void registry::set_formatter(std::unique_ptr<formatter> formatter)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    formatter_ = std::move(formatter);
+    for (auto &l : loggers_)
+    {
+        l.second->set_formatter(formatter_->clone());
+    }
+}
+
+void registry::set_level(level::level_enum log_level)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    for (auto &l : loggers_)
+    {
+        l.second->set_level(log_level);
+    }
+    level_ = log_level;
+}
+
+void registry::flush_on(level::level_enum log_level)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    for (auto &l : loggers_)
+    {
+        l.second->flush_on(log_level);
+    }
+    flush_level_ = log_level;
+}
+
+void registry::flush_every(std::chrono::seconds interval)
+{
+    std::lock_guard<std::mutex> lock(flusher_mutex_);
+    std::function<void()> clbk = std::bind(&registry::flush_all, this);
+    periodic_flusher_ = details::make_unique<periodic_worker>(clbk, interval);
+}
+
+void registry::set_error_handler(void (*handler)(const std::string &msg))
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    for (auto &l : loggers_)
+    {
+        l.second->set_error_handler(handler);
+    }
+    err_handler_ = handler;
+}
+
+void registry::apply_all(const std::function<void(const std::shared_ptr<logger>)> &fun)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    for (auto &l : loggers_)
+    {
+        fun(l.second);
+    }
+}
+
+void registry::flush_all()
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    for (auto &l : loggers_)
+    {
+        l.second->flush();
+    }
+}
+
+void registry::drop(const std::string &logger_name)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    loggers_.erase(logger_name);
+    if (default_logger_ && default_logger_->name() == logger_name)
+    {
+        default_logger_.reset();
+    }
+}
+
+void registry::drop_all()
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    loggers_.clear();
+    default_logger_.reset();
+}
+
+// clean all resources and threads started by the registry
+void registry::shutdown()
+{
+    {
+        std::lock_guard<std::mutex> lock(flusher_mutex_);
+        periodic_flusher_.reset();
+    }
+
+    drop_all();
+
+    {
+        std::lock_guard<std::recursive_mutex> lock(tp_mutex_);
+        tp_.reset();
+    }
+}
+
+std::recursive_mutex &registry::tp_mutex()
+{
+    return tp_mutex_;
+}
+
+void registry::set_automatic_registration(bool automatic_regsistration)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    automatic_registration_ = automatic_regsistration;
+}
+
+registry &registry::instance()
+{
+    static registry s_instance;
+    return s_instance;
+}
+
+void registry::throw_if_exists_(const std::string &logger_name)
+{
+    if (loggers_.find(logger_name) != loggers_.end())
+    {
+        throw spdlog_ex("logger with name '" + logger_name + "' already exists");
+    }
+}
+
+void registry::register_logger_(std::shared_ptr<logger> new_logger)
+{
+    auto logger_name = new_logger->name();
+    throw_if_exists_(logger_name);
+    loggers_[logger_name] = std::move(new_logger);
+}
+} // namespace details
+} // namespace spdlog