ABSTRACT
Zrug church (remains of it) is standing on the top of the 30 m hill in the Caucasian mountains in the Northern Ossetia – Alania on the level of 2122 m over the sea level. It is dated approximately by 11–12 c. It is one of the basilica type churches built by Christian missionaries on the Northern slope of Caucasus Mountains. This zone is known for its seismic activity, and many abandoned monuments – stone towers, dwelling houses and shrines are affected by seismic vibration. In our case seismic activity affected the hill on which the old church stands. The large part of it is vanished into the river at the top of it. This was the reason for the part of church to follow the landslide and gradually only one Eastern wall and parts of adjoining walls still exist.
