Many thanks to Jaroslav for sending this great card from Tiraspol!
Noul Neamţ Monastery is the biggest religious complex in the breakaway territory of Transnistria (governed as the Pridnestrovian Moldovian Republic). PMR is a state with limited recognition, located between the Dniester River and the eastern Moldovan border to Ukraine, and with Tiraspol as its capital.
Transnistria declared its independance from Moldova in 1990, and in 1993 started printing its own stamps. However, these stamps are not recognised outside the country and are valid only for domestic service within Transnistria. I guess I'd have to travel there, stay for a while and send post to myself! xD