An important monument of the Second Byzantine period in Crete, Agios Ioannis Church in Roukani, standing in fairly good condition. Probably belongs in a monastic edifice dedicated to Agios Ioannis Theologos and the Catholic of the monastery.
In the village square there is the two-Aisled old church of Agia Zoni & St. Nicholas.
The Church of Agia Paraskevi is a major monument of the first centuries of Venetian rule. In Catasticum Ecclesiarum et monasteriorum Communis of 1320-1321 refers that "the inhabitants of the village of Siva attest that there is the Church of s. Veneranda (Agia Paraskevi), and the dilapidated s. Giorgio and s. Giovanni Apano Simos villages and Cato Simos ', villages which are placed near the Siva.