Joomla! 1.5 Template Tutorial
From Joomla! Documentation
The "J1.5" namespace is an archived namespace. This page contains information for a Joomla! version which is no longer supported. It exists only as a historical reference, it will not be improved and its content may be incomplete and/or contain broken links.
This Joomla! 1.5 Template Tutorial is a collection of articles that explains the different aspects of creating a Template for Joomla! 1.5. You should start with the top article and work your way down the list.