Martino dei Bianchi church San Michele the Lesser San Michele Arcangelo ai Minoriti (Franciscan) church, a second Minoritelli church is nearby San Nicolò l'Arena (1687), unfinished basilica church and extensive Benedictine Monastery of San Nicolò l'Arena (1558) San Nicolas al Borgo San Placido (1769) church Madonna delle Grazie Chapel Santa Rita in Sant'Agostino church San Sebastiano (1313) Santa Teresa, Carmelitan church and convent Santissima Trinità, church Santa Ursula Chiesa delle Verginelle di Sant'Agata San Vincenzo de' Paoli, church Santissimo Sacramento al Borgo church Chapel of the Blind's Housing (Ospizio dei Ciechi) Santissimo Sacramento al Duomo, church Church of the Holy Child Our Lady of Providence San Berillo in Santa Maria degli Ammalati, church Our Lady of the Poor Little Saviour's Byzantine Chapel Church of the Santissimo Sacramento Ritrovato (1796). Sanctuary of Our Lady of Ognina (1308). Ognina is the maritime quarter and the main fishing port in Catania. Many bareboats and sailing vessels gather here all year round. In its close vicinity is a cylindrical tower known as Saint Mary's Tower (Torre Santa Maria), which was restructured in the 16th century to prevent the frequent plundering by the Saracen pirates. The church is the result of the gradual modification of the Greek Temple Athena Longatis or Parthenos Longatis that existed on the steep reef. This cult was imported from a Boeotian region of Greece called Longas from where the first Hellenic settlers of this borough probably came. After the earthquake of 1693 it was rebuilt in the same place, but with a different orientation. Our Lady of Montserrat (1755) Saint Mary of La Salette Our Lady of Concordia Our Lady of Consolation Santissimo Crocifisso Maiorana church Crucifix of Miracles Crucifix of Good Death Our Lady of La Mecca Most Holy Redeemer Divina Maternità church Chapel of Mary Auxiliatrix Chapel of the Sacred Heart of Jesus church Sacro Cuore al Fortino (1898) church Saints George and Denis Sacred Heart Church of the Capuchins Saint Christopher Saints Cosmas and Damian Saint Vitus Santi Angeli Custodi church Santissimo Salvatore church Other Ursino Castle, built by emperor Frederick II in the 13th century. Palazzo degli Elefanti (Palace of the Elephants), designed by Vaccarini, houses the municipality offices. Biscari Palace Tezzano Palace Uzeda Gate The Medieval Gothic-Catalan Arch of Saint John of Friars (San Giovanni de' Fleres) Porta Garibaldi, triumphal arch, originally Porta Ferdinandea erected in 1768 to celebrate the wedding of King Ferdinand I