Big Ben Aden is a clock tower built by British engineers, along with locals, beside Aden Harbour in Yemen during the period that Aden Province was a territory within the British Empire. It is superficially similar to the Elizabeth Tower, the famous clock tower attached to the Palace of Westminster in London. The clock was shut down for renovation in 1986 and returned to service in February 2012. The tower was built during the 19th century as part of the British colonisation of Aden Province, which began in 1839 and came to an end in 1967.