Monasteries were abandoned following the Scottish Reformation of 1560, and the Calton Hill monastery therefore stood empty before conversion in 1591 into a hospital for lepers, founded by John Robertson, a city merchant. So severe were the regulations that escape, or even the opening of the gate of the hospital between sunset and sunrise, would incur the penalty of death carried out on the gallows erected at the gate. The monastery would appear to have been located at the north-east end of Greenside Row and its site is shown there on the 1931 Ordnance Survey maps. Ten skeletons found in July 2009 during roadworks to create a new tramway in Leith Walk (later cancelled but currently undergoing public consultation ) are believed to have been connected with the hospital.