diff --git a/bin/install-wp-tests.sh b/bin/install-wp-tests.sh
old mode 100644
new mode 100755
diff --git a/docs/guides/template-locations.md b/docs/guides/template-locations.md
index 187712e56..50b748ee8 100644
--- a/docs/guides/template-locations.md
+++ b/docs/guides/template-locations.md
@@ -23,6 +23,40 @@ Timber::$locations = array(
 );
 ```
 
+## Register your own namespaces
+
+You can also use namespaces in your locations too, just define it as the value next to a path, for example:
+
+```php
+<?php
+Timber::$locations = array(
+    '/Users/jared/Sandbox/templates',
+    '~/Sites/timber-templates/',
+    ABSPATH.'/wp-content/templates',
+    ABSPATH.'/wp-content/styleguide' => 'styleguide'
+);
+```
+
+In the example above the namespace is called `styleguide`. You must prefix this with `@` when using it in templates (that's how Twig can differentiate namespaces from regular paths).
+Assuming you have a template called `menu.twig` within that namespace, you would call it like so:
+
+```twig
+{% include '@styleguide/menu.twig' %}
+```
+
+You can also register multiple paths for the same namespace. Order is important as it will look top to bottom and return the first one it encounters, for example:
+
+```php
+<?php
+Timber::$locations = array(
+    '/Users/jared/Sandbox/templates',
+    '~/Sites/timber-templates/',
+    ABSPATH.'/wp-content/templates',
+    ABSPATH.'/wp-content/styleguide' => 'styleguide',
+    '/Users/jared/Sandbox/styleguide' => 'styleguide'
+);
+```
+
 You only need to do this once in your project (in `functions.php` of your theme). When you call one of the render or compile functions from a PHP file (say `single.php`), Timber will look for Twig files in these locations before it checks the child or parent theme.
 
 ## Changing the default folder for Twig files
diff --git a/lib/Loader.php b/lib/Loader.php
index 30455fdb5..cb05bf6cb 100644
--- a/lib/Loader.php
+++ b/lib/Loader.php
@@ -3,6 +3,7 @@
 namespace Timber;
 
 use Timber\Cache\Cleaner;
+use Twig\Loader\FilesystemLoader;
 
 class Loader {
 
@@ -16,6 +17,9 @@ class Loader {
 	const CACHE_SITE_TRANSIENT = 'site-transient';
 	const CACHE_USE_DEFAULT = 'default';
 
+	/** Identifier of the main namespace. Will likely mirror Twig\Loader\FilesystemLoader::MAIN_NAMESPACE */
+	const MAIN_NAMESPACE = '__main__';
+
 	public static $cache_modes = array(
 		self::CACHE_NONE,
 		self::CACHE_OBJECT,
@@ -130,16 +134,27 @@ protected function template_exists( $name ) {
 	 * @return \Twig_Loader_Filesystem
 	 */
 	public function get_loader() {
-		$open_basedir = ini_get('open_basedir');
-		$paths = array_merge($this->locations, array($open_basedir ? ABSPATH : '/'));
-		$paths = apply_filters('timber/loader/paths', $paths);
+		$open_basedir = ini_get( 'open_basedir' );
+		$paths        = array_merge_recursive(
+			$this->locations,
+			array( self::MAIN_NAMESPACE => $open_basedir ? ABSPATH : '/' )
+		);
+		$paths        = apply_filters( 'timber/loader/paths', $paths );
 
 		$rootPath = '/';
 		if ( $open_basedir ) {
 			$rootPath = null;
 		}
-		$fs = new \Twig_Loader_Filesystem($paths, $rootPath);
-		$fs = apply_filters('timber/loader/loader', $fs);
+		$fs = new \Twig_Loader_Filesystem( array(), $rootPath );
+		foreach ( $paths as $namespace => $path_locations ) {
+			if ( is_array( $path_locations ) ) {
+				array_map( function ( $path ) use ( $fs, $namespace ) {
+					$fs->addPath( $path, $namespace );
+				}, $path_locations );
+			}
+		}
+		$fs = apply_filters( 'timber/loader/loader', $fs );
+
 		return $fs;
 	}
 
diff --git a/lib/LocationManager.php b/lib/LocationManager.php
index 62ffbe488..091e00e07 100644
--- a/lib/LocationManager.php
+++ b/lib/LocationManager.php
@@ -12,17 +12,26 @@ class LocationManager {
 	public static function get_locations( $caller = false ) {
 		//prioirty: user locations, caller (but not theme), child theme, parent theme, caller
 		$locs = array();
-		$locs = array_merge($locs, self::get_locations_user());
-		$locs = array_merge($locs, self::get_locations_caller($caller));
+		$locs = array_merge_recursive( $locs, self::get_locations_user() );
+		$locs = array_merge_recursive( $locs, self::get_locations_caller( $caller ) );
 		//remove themes from caller
-		$locs = array_diff($locs, self::get_locations_theme());
-		$locs = array_merge($locs, self::get_locations_theme());
-		$locs = array_merge($locs, self::get_locations_caller($caller));
-		$locs = array_unique($locs);
+		$locs = array_merge_recursive( $locs, self::get_locations_theme() );
+		$locs = array_merge_recursive( $locs, self::get_locations_caller( $caller ) );
+		$locs = array_map( 'array_unique', $locs );
+
 		//now make sure theres a trailing slash on everything
-		$locs = array_map('trailingslashit', $locs);
-		$locs = apply_filters('timber_locations', $locs);
-		$locs = apply_filters('timber/locations', $locs);
+		$locs = array_map( function ( $loc ) {
+			return array_map( 'trailingslashit', $loc );
+		}, $locs );
+
+		$locs = array_map( function ( $loc ) {
+			return apply_filters( 'timber_locations', $loc );
+		}, $locs );
+
+		$locs = array_map( function ( $loc ) {
+			return apply_filters( 'timber/locations', $loc );
+		}, $locs );
+
 		return $locs;
 	}
 
@@ -33,19 +42,19 @@ public static function get_locations( $caller = false ) {
 	protected static function get_locations_theme() {
 		$theme_locs = array();
 		$theme_dirs = LocationManager::get_locations_theme_dir();
-		$roots      = array(get_stylesheet_directory(), get_template_directory());
-		$roots      = array_map('realpath', $roots);
-		$roots      = array_unique($roots);
+		$roots      = array( get_stylesheet_directory(), get_template_directory() );
+		$roots      = array_map( 'realpath', $roots );
+		$roots      = array_unique( $roots );
 		foreach ( $roots as $root ) {
-			if ( !is_dir($root) ) {
+			if ( ! is_dir( $root ) ) {
 				continue;
 			}
-			$theme_locs[] = $root;
-			$root         = trailingslashit($root);
+			$theme_locs[ Loader::MAIN_NAMESPACE ][] = $root;
+			$root                                   = trailingslashit( $root );
 			foreach ( $theme_dirs as $dirname ) {
-				$tloc = realpath($root.$dirname);
-				if ( is_dir($tloc) ) {
-					$theme_locs[] = $tloc;
+				$tloc = realpath( $root . $dirname );
+				if ( is_dir( $tloc ) ) {
+					$theme_locs[ Loader::MAIN_NAMESPACE ][] = $tloc;
 				}
 			}
 		}
@@ -105,17 +114,29 @@ public static function get_locations_theme_dir() {
 	 */
 	protected static function get_locations_user() {
 		$locs = array();
-		if ( isset(Timber::$locations) ) {
-			if ( is_string(Timber::$locations) ) {
-				Timber::$locations = array(Timber::$locations);
+		if ( isset( Timber::$locations ) ) {
+			if ( is_string( Timber::$locations ) ) {
+				Timber::$locations = array( Timber::$locations );
 			}
-			foreach ( Timber::$locations as $tloc ) {
-				$tloc = realpath($tloc);
-				if ( is_dir($tloc) ) {
-					$locs[] = $tloc;
+			foreach ( Timber::$locations as $tloc => $namespace_or_tloc ) {
+				if ( is_string( $tloc ) ) {
+					$namespace = $namespace_or_tloc;
+				} else {
+					$tloc      = $namespace_or_tloc;
+					$namespace = null;
+				}
+
+				$tloc = realpath( $tloc );
+				if ( is_dir( $tloc ) ) {
+					if ( ! is_string( $namespace ) ) {
+						$locs[ Loader::MAIN_NAMESPACE ][] = $tloc;
+					} else {
+						$locs[ $namespace ][] = $tloc;
+					}
 				}
 			}
 		}
+
 		return $locs;
 	}
 
@@ -125,21 +146,22 @@ protected static function get_locations_user() {
 	 */
 	protected static function get_locations_caller( $caller = false ) {
 		$locs = array();
-		if ( $caller && is_string($caller) ) {
-			$caller = realpath($caller);
-			if ( is_dir($caller) ) {
-				$locs[] = $caller;
+		if ( $caller && is_string( $caller ) ) {
+			$caller = realpath( $caller );
+			if ( is_dir( $caller ) ) {
+				$locs[ Loader::MAIN_NAMESPACE ][] = $caller;
 			}
-			$caller = trailingslashit($caller);
+			$caller = trailingslashit( $caller );
 			foreach ( LocationManager::get_locations_theme_dir() as $dirname ) {
-				$caller_sub = realpath($caller.$dirname);
-				if ( is_dir($caller_sub) ) {
-					$locs[] = $caller_sub;
+				$caller_sub = realpath( $caller . $dirname );
+				if ( is_dir( $caller_sub ) ) {
+					$locs[ Loader::MAIN_NAMESPACE ][] = $caller_sub;
 				}
 			}
 		}
+
 		return $locs;
 	}
 
 
-}
\ No newline at end of file
+}
diff --git a/lib/Timber.php b/lib/Timber.php
index 89fd2a467..76666e1a2 100644
--- a/lib/Timber.php
+++ b/lib/Timber.php
@@ -439,22 +439,26 @@ public static function get_sidebar( $sidebar = 'sidebar.php', $data = array() )
 	 * @return string
 	 */
 	public static function get_sidebar_from_php( $sidebar = '', $data ) {
-		$caller = LocationManager::get_calling_script_dir(1);
-		$uris = LocationManager::get_locations($caller);
+		$caller = LocationManager::get_calling_script_dir( 1 );
+		$uris   = LocationManager::get_locations( $caller );
 		ob_start();
 		$found = false;
-		foreach ( $uris as $uri ) {
-			if ( file_exists(trailingslashit($uri).$sidebar) ) {
-				include trailingslashit($uri).$sidebar;
-				$found = true;
-				break;
+		foreach ( $uris as $namespace => $uri_locations ) {
+			if ( is_array( $uri_locations ) ) {
+				foreach ( $uri_locations as $uri ) {
+					if ( file_exists( trailingslashit( $uri ) . $sidebar ) ) {
+						include trailingslashit( $uri ) . $sidebar;
+						$found = true;
+					}
+				}
 			}
 		}
-		if ( !$found ) {
-			Helper::error_log('error loading your sidebar, check to make sure the file exists');
+		if ( ! $found ) {
+			Helper::error_log( 'error loading your sidebar, check to make sure the file exists' );
 		}
 		$ret = ob_get_contents();
 		ob_end_clean();
+
 		return $ret;
 	}
 
diff --git a/tests/namespaced/test-namespaced.twig b/tests/namespaced/test-namespaced.twig
new file mode 100644
index 000000000..79e526307
--- /dev/null
+++ b/tests/namespaced/test-namespaced.twig
@@ -0,0 +1 @@
+This is a namespaced template.
diff --git a/tests/namespaced/test-nested.twig b/tests/namespaced/test-nested.twig
new file mode 100644
index 000000000..ae71e17bd
--- /dev/null
+++ b/tests/namespaced/test-nested.twig
@@ -0,0 +1 @@
+{% include '@namespaced/test-namespaced.twig' %}
diff --git a/tests/namespaced/thumb-test.twig b/tests/namespaced/thumb-test.twig
new file mode 100644
index 000000000..ce129953d
--- /dev/null
+++ b/tests/namespaced/thumb-test.twig
@@ -0,0 +1 @@
+<img src="{{post.thumbnail.src|resize(size.width, size.height)}}" alt="namespaced" />
diff --git a/tests/test-timber-loader.php b/tests/test-timber-loader.php
index ac722a7a6..6f8aebc88 100644
--- a/tests/test-timber-loader.php
+++ b/tests/test-timber-loader.php
@@ -34,6 +34,7 @@ function testTwigPathFilterAdded() {
 		function testTwigPathFilter() {
 			$php_unit = $this;
 			add_filter('timber/loader/paths', function($paths) use ($php_unit) {
+				$paths = call_user_func_array('array_merge', $paths);
 				$count = count($paths);
 				$php_unit->assertEquals(3, count($paths));
 				$pos = array_search('/', $paths);
@@ -134,5 +135,65 @@ function testTwigLoadsFromLocation(){
 			$this->assertEquals('<img src="" />', trim($str));
 		}
 
+		function testTwigLoadsFromLocationWithNamespace(){
+			Timber::$locations = array( __DIR__.'/assets' => 'assets' );
+			$str = Timber::compile('@assets/thumb-test.twig');
+			$this->assertEquals('<img src="" />', trim($str));
+		}
+
+		function testTwigLoadsFromLocationWithNestedNamespace(){
+			Timber::$locations = array( __DIR__.'/namespaced' => 'namespaced' );
+			$str = Timber::compile('@namespaced/test-nested.twig');
+			$this->assertEquals('This is a namespaced template.', trim($str));
+		}
+
+		function testTwigLoadsFromLocationWithAndWithoutNamespaces(){
+			Timber::$locations = array( __DIR__.'/namespaced' => 'namespaced', __DIR__ . '/assets' );
+
+			// Namespaced location
+			$str = Timber::compile('@namespaced/test-namespaced.twig');
+			$this->assertEquals('This is a namespaced template.', trim($str));
+
+			// Non namespaced location
+			$str = Timber::compile('thumb-test.twig');
+			$this->assertEquals('<img src="" />', trim($str));
+		}
+
+		function testTwigLoadsFromLocationWithAndWithoutNamespacesAndDirs(){
+			Timber::$dirname = array('foo', 'views');
+			Timber::$locations = array( __DIR__.'/namespaced' => 'namespaced', __DIR__ . '/assets' );
+
+			// Namespaced location
+			$str = Timber::compile('@namespaced/test-namespaced.twig');
+			$this->assertEquals('This is a namespaced template.', trim($str));
+
+			// Non namespaced location
+			$str = Timber::compile('thumb-test.twig');
+			$this->assertEquals('<img src="" />', trim($str));
+
+			if (!file_exists(get_template_directory().'/foo')) {
+				mkdir(get_template_directory().'/foo', 0777, true);
+			}
+			copy(__DIR__.'/assets/single-foo.twig', get_template_directory().'/foo/single-foo.twig');
+
+			// Dir
+			$str = Timber::compile('single-foo.twig');
+			$this->assertEquals('I am single-foo', trim($str));
+		}
+
+		function testTwigLoadsFromMultipleLocationsWithNamespace(){
+			Timber::$locations = array( __DIR__.'/assets' => 'assets', __DIR__ .'/namespaced' => 'assets' );
+			$str = Timber::compile('@assets/thumb-test.twig');
+			$this->assertEquals('<img src="" />', trim($str));
+
+			$str = Timber::compile('@assets/test-namespaced.twig');
+			$this->assertEquals('This is a namespaced template.', trim($str));
+		}
+
+		function testTwigLoadsFirstTemplateWhenMultipleLocationsWithSameNamespace(){
+			Timber::$locations = array( __DIR__.'/assets' => 'assets', __DIR__ .'/namespaced' => 'assets' );
+			$str = Timber::compile('@assets/thumb-test.twig');
+			$this->assertEquals('<img src="" />', trim($str));
+		}
 
 	}