In 1922 Vacca succeeded his old professor of History and Geography of East Asia to the chair at Florence. Vacca taught Chinese language and literature there until he retired in 1947.
Sa 1922 Vacca Tagumpay ang kanyang old propesor ng Kasaysayan at Heograpiya ng East Asia sa upuan sa Florence. Vacca tinuturuan Chinese wika at literatura doon hanggang siya ay nagretiro sa 1947.