The construction of the apse in the Cathedral of Vicenza had begun in 1482 to the design of Lorenzo da Bologna, but in 1531 it was still unfinished. Early, temporary, roofing was erected in 1540, as a result of the possibility that Vicenza might host the Church Council which in the end was held at Trent.
http://www.officeoftourism.org/europe/italy/Veneto/vicenza.asp