diff --git a/__init__.py b/__init__.py
new file mode 100644
index 0000000..8acd8be
--- /dev/null
+++ b/__init__.py
@@ -0,0 +1,29 @@
+##############################################################################
+#
+# Copyright (c) 2004 Zope Corporation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+"""``Rotterdam`` skin package.
+
+$Id$
+"""
+__docformat__ = "reStructuredText"
+from zope.publisher.interfaces.browser import IBrowserRequest
+from zope.publisher.interfaces.browser import IDefaultBrowserLayer
+
+class rotterdam(IBrowserRequest):
+    """Layer for registering Rotterdam-specific macros."""
+
+class Rotterdam(rotterdam, IDefaultBrowserLayer):
+    """The ``Rotterdam`` skin.
+
+    It is available via ``++skin++Rotterdam``.
+    """