The Orthodox convent known as the Holy Monastery of Zoodohos Pigi is tucked away in the back alleys of Hora. You can’t go beyond its pretty little courtyard, where a small church holds remarkable 17th-century frescoes. One of the 40 resident nuns will cheerfully point out Jesus on Judgement Day dispatching assorted bishops and clerics down a river of fire that flows into the maw of the beast.