sentences:  Italian influence on Lyon's architecture is still visible among historic buildings.In the late 1400s and 1500s Lyon was also a key centre of literary activity and book publishing, both of French writers (such as Maurice Scève, Antoine Heroet, and Louise Labé) and of Italians in exile (such as Luigi Alamanni and Gian Giorgio Trissino).In 1572, Lyon was a scene of mass violence by Catholics against Protestant Huguenots in the St. Bartholomew's Day Massacre.