 Shortly after their assignment to San Giacomo , the brethren started to reconstruct it , choosing as architect Antonio da Sangallo the Younger , but due to lack of funds its facade was still unfinished in 1590 . That year Ludovico Fulgineo , ecclesiastical referendary and governor of the archconfraternity , died , leaving his inheritance to the association . Thanks to his legacy , two years later , the construction was finished . In 1601 , an oratory dedicated to Saint Sebastian was built behind the church . 
