Italian architect, active in Moscow, known as Bon Fryazin, yet unindentified in Italy. He lead a group of Milanese masters working in Moscow. He remained in Moscow after the death of Pietro Antonio Solari in 1493 and the departure of Aloisio da Carcano for Poland some ten years later. This group built the Ivan the Great Bell Tower which can be related to late-fifteenth-century Lombard campaniles. //