Complex sentence: Currently, very few remains from the Byzantine period have been found on the Citadel Hill, although the two mosques inside the Citadel are known to be converted from churches originally built by the Byzantines.
Split into simpler sentences: Currently, very few remains from the Byzantine period have been found on the Citadel Hill. The two mosques inside the Citadel are known to be converted from churches originally built by the Byzantines.