The first time that a church's ruins have been discovered with three naves under the base of an architectural ruin of a watchtower is happened in 2009 in Myndos' Asar Island, when the archeological excavations had started at the top of the island.The ground of the church had been made by using the technique of opus tesselatum, and covered by an geometrical patterned mosaic. However that mosaic had been only protected one piece at the North nave and mostly in the middle nave. Most of the floor pavement of North nave had been ruined because of multiple reasons and had been found at the lower terrace with pieces by the reason of fall down. At the South nave none of mosaic ruins had been found. The mosaic floor dated late 5th - early 6th A.D. by the style and the ruins that have been found with it. In that article information's will be given about that mosaic's floor and consolidation.