V - VI AD - Kotayk Marz Ptghavank (Պտղնավանք, in the Ptghni
village of Abovyan region) is situated in the center of an
archeological plot. While doing some work here there were found
the remainders of dwellings, different commercial buildings, as
well as ceramics and other worthy artifacts. The Ptghavank
Church is one of the most important representatives of the domed
hall type of church. The exact date of foundation of the temple
isn't known. The examination of historical records and the
architectural form of the construction give some reason to
believe it is circa VI c. The whole dome stood on massive pylons
underneath the wall. The passage from the square under the dome
to the base of the octahedral drum was realized through the
mediation of the tromps, the remainders of one of which remains
in the NE corner of the square under the dome. The longitudinal
east-west axis of the church ends with the altar apse with side-
chapels on either side. Only two bottom rows of the apse's walls
remain. The northern wall