Located at the Heritage zone of George Town, the Kapitan Keling Mosque is one of the oldest and famous landmarks in the island.
The mosque was built by the the head of the Indian Muslim community in Penang during the year 1800, and is located at along Jalan Masjid Kapitan Keling (formerly Pitt Street but was later renamed after the mosque). The historic mosque was also used previously as the state mosque of Penang. The name “kapitan keling” is used to denote the headman or leader of the South Indian Muslim community.
Further info on the mosque here: http://www.visitpenang.gov.my/portal3/what-to-see/attractions/kapitan-keling-mosque.html