The convent, founded in the sixteenth century by order of Giovanni from Capestrano, was gradually adjusted and enlarged until the mid XIX century. In 1735 a wide presbytery with an apse and two chapels were added on the right side; in 1709 the cloister was built on the left side of the church and in 1742 the structure was completed with a dormitory and a precious library, rich of documents and extremely valuable books. In 1750 the cloister was joined to the upper level through a magnificent staircase. The building includes the Museum of the Convent of San Giovanni from Capestrano, which preserves evidences of the saint born in the town.