Sidi Boumediene Mosque or the Worshipper's Mosque is a historic Islamic religious complex In Tlemcen, Algeria, dedicated to the influential Sufi saint Abu Madyan. Abu Madyan was hailed from Seville and contributed greatly to the spread of tasawwuf in the Maghreb region.

Tlemcen is the second-largest city in northwestern Algeria after Oran and is the capital of Tlemcen Province. The city has developed leather, carpet, and textile industries, which it exports through the port of Rachgoun. It had a population of 140,158, as of the 2008 census.