The Leone XIII Institute is a private Catholic school of the Society of Jesus. Founded in 1893, it is part of the World Network of Jesuit Colleges and the Gesuiti Educazione Foundation.

It is committed to following the rich spiritual and pedagogical tradition of the Society and is an integral part of Milan's cultural history.

The Institute's primary educational purpose is the formation of "men and women for and with others", aiming to contribute to the construction of the common good.

It welcomes students from 6 to 19 years old, offering Primary School, Lower Secondary School and Classical, Scientific and Scientific Sports High Schools.