He trained in
Rome and spent his early working life there before going to Poland with his uncle
Matteo Castelli, who became Poland's first royal architect. On Castelli's death he moved back to Italy to work on buildings in Bissone and
Lugano. He then returned to Warsaw as architect to
Władysław IV Vasa, who commissioned important buildings from him in Warsaw,
Kraków,
Leopoli,
Gniezno, and
Vilnius (
Grand Duchy of Lithuania). ==References==