Pietro Antonio Solari, also known as Pyotr Fryazin (b. after 1450, Milan(?) - 1493, Moscow) was an Italian architect. Pietro Solari's teacher was his father Guiniforte Solari, himself an architect and sculptor. In 1476, Pietro Solari was hired to continue the construction of the Duomo di Milano. Later on, he was in charge of several construction projects in Milan. Wikipedia
The definitive Wikipedia entry for Pietro Antonio Solari. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Pietro_Antonio_Solari