 The building of a church dedicated to Saint George during the 6th century CE indicates that by this time Jifna , now under Byzantine rule , had become a Christian town . Besides the church , other remains from this era are located in Jifna , including a Jewish tomb , a tower ( Burj Jifna ) once used by the Ottomans as a prison , a Roman villa , an olive oil press and a <unk> . 
