The Monastery of Sanahin I found most impressive of all armenian monasterys, there might be more beautiful ones like Noravank, but this one had some special atmosphere, so thats why we dedicated it this multicache which is quite easy and can be done in 10min.
The start coordinates should bring you to a wall with lots of engraved crosses. You clearly see there are white numbers written at each stone in the wall. You will have to count some crosses of the "t-row", which is the 5th row when you are counting the stones from the bottom. To solve the multicache you need A, B, C and D. They correlate with the number of engraved crosses in the related stone in the wall.
N 41° 05.(C-D)(2C+A)B
E 044° 40.(2B-C)(A+C)D
see spoiler picture...
PS: Its a nice walk from Sanahin to the Haghpat Monastery! Furthermore runs a cablecar from the town Alaverdi in the valley up the hill, from here its a 10min walk to Sanahin Monastery