Hooghly Imambara is a Shia Muslim congregation hall and mosque in Hooghly, West Bengal, India. The construction of the building was started by Muhammad Mohsin in 1841 and completed in 1861. The building is a two storied structure, with a tall clock tower over the entrance gate. The mosque has intricate designs and texts from Quran engraved on the wall. The interior of the mosque is decorated with marbles, candles and hanging lanterns. Hooghly Imambara is famous for its vaunted clock. It is at the middle of the twin towers constructed on the doorway of the main entrance. Each tower, having a height of approximately 150 ft., takes 152 steps to reach its top. The clock has two dials with three bells having weight 80 mds, 40 mds and 30 mds. Smaller bells ring at an interval of 15 minutes and bigger bell rings to signify one hour. The clock requires two people to wind it for half an hour of each week, with a key weighing 20 kg. It was bought for Rs. 11,721 (in 1852) by Syed Keramat Ali from the manufacturer: M/s Black & Hurray Co., Big Ben, London. It is in Hoogly District. People coming from Kolkata have to take a train (Local or Express) to Naihati Junction. From there they get off at Hoogly Ghat Station. From there, Imambara is in a walking distance.