A beautiful little monastery in Montenegro on the border with Bosnia-Herzegovina.
More information about the monastery can be found here:
https://www.heritage-bih-mne.com/en/the-zagradje-monastery/
You can play a small multi on site. Look for the entrance door to the monastery area (not the church door) at the listing coordinates.
There are several rows of knobs/screwheads here. Each row has the same number of screwheads. How many are in ONE row?
This is your number A.
You can find a petling in the usual place, but well hidden from everyone's eyes here:
N 43° 20.(A-3)A1 E 18° 51.1A7
Have fun and take a look around the monastery and church. It's definitely worth a visit!