Ashley Jackson writes in her book Buildings of Empire:
“Sometimes the British adopted buildings that pre-dated their arrival... Government House Lahore was build around the tomb of Mohammed Kasim Khan (died 1635). Its centre was a domed dining room, formed from the upper part of the tomb itself; below it was a kitchen, in which the sarcophagus served as a chopping board.”
Kasim, a cousin of the Mughal emperor Akbar, built it while he was alive. He was buried somewhere else. The prince was very fond of wrestling and a patron of many wrestlers, and the place was known as the Wrestlers’ Dome (Kushtiwala Gumbaz).