Jamek Mosque, officially Sultan Abdul Samad Jamek Mosque is one of the oldest mosques in Kuala Lumpur, Malaysia. It is located at the confluence of the Klang and Gombak rivers and may be accessed via Jalan Tun Perak. The mosque was designed by British architect and soldier Arthur Benison Hubback, and built in 1909. It was the principal mosque of Kuala Lumpur until the construction of the national mosque Masjid Negara in 1965.

The Klang River is a river which flows through Kuala Lumpur and Selangor in Malaysia and eventually flows into the Straits of Malacca. It is approximately 120 km (75 mi) in length and drains a basin of about 1,288 km2 (497 sq mi). The Klang River has 11 major tributaries.