The Roman Catholic Diocese of Alessano (Latin: Dioecesis Alexanensis) was a Roman Catholic diocese in Italy, located in the city of Alessano, in the province of Lecce, part of Apulia region of south-east Italy.
On 17 May 1518, it was suppressed, its territory being merged into the diocese of Lecce under Bishop Giovanni Antonio Acquaviva d'Aragona, but it was restored on 3 June 1521.
Byzantine liturgical usages continued to be observed until abolished by Bishop Ercole Lamia (1578–1591).
[3][4] The existence of the residential see was ended by the papal bull De utiliori of 27 June 1818 of Pope Pius VII, which assigned its territory to the then diocese of Ugento.
It has had the following incumbents, of the lowest (episcopal) class, except the first and the latest (who were granted the Personal Title and rank of Archbishop) :