The mother church of Giuliano, dedicated to San Giovanni Crisostomo, was built in the sixteenth century on a preexisting building. The numerous restorations and renovations that it had been put through over the centuries have led to its current appearance: a façade in neoclassic style with pilasters and central door surmounted by an epigraph with a dedication, all results of work carried out at the end of nineteenth century. The interior, with three naves, is rich in operas created in different periods. Some frescoes of 1564 and a bas-relief in Leccese stone of 1612 depicting "the Mercy" are remains of the oldest phase of the church. The side chapels are home to Baroque altars topped with some paintings of great artistic value. The stucco of the vaults and columns as well as the pipe organ by Simon Kirker (1721) are of the eighteenth century .