White Rotunda (Біла альтанка) in Sobornaya Square, Poltava (Полтава). It is a landmark for this city. Thanks Raznitsyna.
A 6Hr Yury Gagarin stamp was used. A large section of stamp selvage from 100 years of St. Sophia Cathedral in Kiev was used as decorative on this card. It was cancelled at Mariupol TSPZ on 22.2.2013.