These 2 cards from Venice, Italy I received in joining a Round Robin.
This is the famous St. Markus basilica. It's one of the best known examples of Byzantine architecture. For its opulent design from the 11th century, its known by the nickname 'Church of Gold'.
This is the basilica della Salute, more commonly known simply as 'The Salute'. It's one of the most photographed churches in Italy.
Both cards came with this stamp.