Complex sentence: Bernabo Visconti (1319-1385), lord of Milan, married Regina della Scala of Verona and forged both a political and aesthetic alliance between the two cities.
Split into simpler sentences: Bernabo Visconti (1319-1385) was a lord of Milan in the 14th century. Bernabò married Regina della Scala of Verona and forged both a political and aesthetic alliance between the two cities.