The interior of the dome, (itself a Byzantine feature), is decorated in a mosaic depicting Christ Pantocrator accompanied by his angels. During Sicily's later Norman era early Gothic influences can be detected such as those in the cathedral at Messina consecrated in 1197. However, here the high Gothic campanile is of a later date and should not be confused with the early Gothic built during the Norman period; which featured pointed arches and windows rather than the flying buttresses and pinnacles later to manifest themselves in the Gothic era. Edifices in Palermo Norman palace with its Palatine Chapel Zisa Cuba Castle of Maredolce Cathedral of Palermo San Giovanni dei Lebbrosi San Giovanni degli Eremiti Santa Maria dell'Ammiraglio also known as Martorana San Cataldo Church of the Holy Spirit (Sicily) also known as Chiesa del Vespro known as Chiesa della Magione The Admiral's Bridge ("Ponte dell'Ammiraglio") Monreale Cathedral and Benedictine cloister Cefalù Cathedral Edifices in Messina Messina Cathedral Church of Chiesa di Santa Maria della Valle Church of the Santissima Annunziata dei Catalani Erice the Venus Castle and the main church ("Duomo dell'Assunta") Castelvetrano, Church of the Santissima Trinità di Delia Casalvecchio Siculo, Church of Santi Pietro e Paolo d'Agrò Itala, the Arabic Norman Church of Saints Peter and Paul Montalbano Elicona, Palatine Chapel Sciacca, Church of San Nicolò la Latina and Church of Santa Maria della Raccomandata Caltanissetta, Abbey of the Santo Spirito San Fratello, Shrine of the Tre Santi Bronte, Norman bridge and Castle of Nelson (old Abbey of St. Mary in Maniace) Syracuse, Church of San Nicolò ai Cordari and Church of San Giovanni alle catacombe (St. John the Catacombs) Nicosia (Sicily), Norman castle Castle of Milazzo San Marco d'Alunzio, Ruins of the Norman Church of St Saviour(S. Salvatore) and ruins of the Norman castle Adrano, Norman castle Aci Castello Motta Sant'Anastasia, Norman tower (Dongione) Caronia, Norman castle Catania Cathedral Ponte dei Saraceni (Norman bridge), Adrano Ponte Calatrasi (Norman bridge), Roccamena Ponte di Cerami (Norman bridge), Cerami Malta After its Norman conquest in 1091, Malta saw the construction of several Norman pieces of architecture. Many have been demolished and rebuilt over the years (especially after the 1693 Sicily earthquake which destroyed many old Norman buildings), however some fortresses and houses still exist in Mdina and Vittoriosa. Transitional style As master masons developed the style and experimented with ways of overcoming the geometric difficulties of groin vaulted ceilings, they