After spending three years in Florence, he returned to his father, who was then building the church of San Giovanni Battista in Pesaro.
Bartolommeo continued the building of San Giovanni Battista and built the Palace of Pesaro.
Genga undertook major alterations to the façade of Auberge de France in Birgu, Malta.
[1] Genga was one of several architects who made preliminary sketches for a new city on Sciberras Hill.
The city – now Malta's capital, Valletta – would be built a few years after his death, to designs of Francesco Laparelli.