Bartolomeo I Querini was born in
Venice around 1230 to
Romeo Querini and Richelda, who may have also been a part of the
Querini family. The Querini family—active in trade since the 12th century—was experiencing a rapid social ascent. The first member of the Querini family to enter the clergy was his uncle, Leonardo, who was the
Primicerius of San Marco from 1229 and
Patriarch of Grado from 1238. ==References==