321 Florentina is a main belt asteroid with an average diameter of about 27.23 km. It was discovered on 1891 October 15th in Vienna by the astronomer Johann Palisa.
Based on it's orbital parameters, it's considered a member of the Coronid family of asteroids.
His name was dedicated by the astronomer to his daughter Florentine.
The name Florentina has Latin origin and means: coming from Florence.