Two very nice stamps issued by Bulgaria in 1972 for the UNESCO Campaign to Save Venice.
The green stamp shows St Mark's Basilica while the brown one shows the Ca' d'Oro, both stylised and with rising waters.
Below, a picture of the Ca' d'Oro.
(Source: http://www.ranker.com/pics/N687204/ca-d-oro-building-attractions-photo-1)
Dating from 1430, this Palazzo has always been known as the Ca' d'Oro (the "House of Gold") due to the gilt decorations which once adorned its exterior walls.
