This is a historical landmark. Constructed by Wallajah family in memory of Nawab Muhammad Ali Walajah, in 1795. It is an imposing structure of symmetry and form of architectural magnificence with an imposing facade. The Mosque stands in extensive grounds, which are being used as a forum for religious and cultural activities. The magnificent grey granite structure is built without steel and wood. This architectural marvel is one of the important mosques in Chennai. The NawabAs descendants are still living in a mansion known as ”’Amir Mahal”’. One distinctive feature of this mosque is that the chronogram engraved in stone and fixed on the inside of the western wall of the mosque is by a non-Muslim, Rajah Makkan Lal Khirad?, a Persian and Arabic scholar of repute, who was the private secretary to the Nawab. It may be mentioned in this regard that, as far as is known, no other mosque in the world has a chronogram composed by a non-Muslim. The Mosque has two minarets at the front. Medieval architecture is clearly visible in the construction of this great mosque. ”The Eid Prayer timing remains the same, 10AM, since 1749 A.D.” This historic mosque is under the management of H.H. Adjoining the Wallajah Mosque is the tomb of the great Islamic saint Maulana Abdul Ali Bahrul Uloom, a divine scholar of the days of the Nawab Wallajah. In this enclosure also are the tombs of the late Nawabs of the Carnatic, the Princess of Arcot and other eminent Muslim scholars and theologians. Wallajah Mosque can be reached either from Ellis Rd (backside) or the Triplicane High Rd.