 The bell towers are the work of Xalapan artist José Damián Ortiz de Castro . They are capped with bell @-@ shaped roofs made of tezontle covered in chiluca , a white stone . Ortiz de Castro was in charge of the cathedral 's construction in the latter half of the 18th century until he died , unexpectedly . Manuel Tolsá of Valencia , who had built other notable buildings in Mexico City , was hired to finish the cathedral . At this point , the cathedral had already been 240 years in the making . He added the neo @-@ Classic structure housing the clock , the statues of the three theological virtues ( Faith , Hope , and Charity ) , the high balustrade surrounding the building , and the dome that rises over the transept . 
 The bell towers <a href='drop_aux' title='1'><mark>are</mark></a>the work of Xalapan artist José Damián Ortiz de Castro . They <a href='drop_aux' title='2'><mark>are</mark></a>capped with bell @-@ shaped roofs made of tezontle covered in chiluca , a white stone . Ortiz de Castro was in charge of the cathedral <a href='null_genetive' title='3'><mark>'s</mark></a>construction in the latter half of the 18th century until he died , unexpectedly . Manuel Tolsá of Valencia , <a href='null_relcl' title='4'><mark>who</mark></a><a href='been_done' title='5'><mark>had</mark></a> built other notable buildings in Mexico City , was hired to finish the cathedral . At this point , the cathedral had already been 240 years in the making . He added the neo @-@ Classic structure housing the clock , the statues of the three theological virtues ( Faith , Hope , and Charity ) , the high balustrade surrounding the building , and the dome <a href='null_relcl' title='6'><mark>that</mark></a><a href='uninflect' title='7'><mark>rises</mark></a> over the transept . 
Da bell towers the wrk of Xalapan artist José Damián Ortiz de Castro . They capped wid bell @-@ shaped roofs made of tezontle covered in chiluca , a white stone . Ortiz de Castro was in charge of the cathedral  construction in tdalatter half of the 18th century til he died , unexpectedly . Manuel Tolsá of Valencia , done built other notable buildings in Mexico City , was hired to finish the cathedral . At this point , thdaathedral had already been 240 yrs in thedaking . He added the da @-@ Classic structure housing the cdak , the statues of the thda theological virtues ( Faith , Hope , and Charity ) , the higdaalustrade surrounding the building , and the dome rise ova the transept .