San Giuliano is a small Gothic-style, Roman Catholic church located on the Piazzetta delle Castello on the southwest corner of the Castello Estense in Ferrara, region of Emilia-Romagna, Italy.

Soon after, by 1405, the church was rebuilt in a former Gothic architecture style, and affiliated with the Order of the Santo Sepolcro.

Above below the oculus is a peculiar relief depicting an bizarre episode in the life of the namesake saint, St Julian the Hospitaller (San Giuliano l’Ospitaliere), wherein he unknowingly slays his visiting parents while they sleep.

[1] The reconstruction of the church had been patronized by Galeotto Avogadri, proto-camerlengo of the marchese Nicolò III.

The small church had altars dedicated to the Albergatori (inn-keepers), Orefici (jewelers), and of the Arte dei Beccai, which included the trades of fishmongers, butchers, and restauranteers.