 In 1787 , José Damian Ortiz de Castro was in charge of finishing work on the cathedral . He did most of the work on the bell towers , putting in most of the <unk> and capping them with roofs in the shape of bells . With his death in 1793 , he did not live to see the cathedral completed , and Manuel Tolsá finished the cathedral by adding the <unk> , the central front facade , the <unk> , and the statues of Faith , Hope and Charity at the top of the front facade . <unk> 's work was the last major construction to the cathedral and the appearance it had when he finished is the basic look the cathedral has today . 
