A nice cover from Vatican City, depicting a complete set of 2 stamps on topic "EUROPA 2017 - Castles". The 0,95 euro stamp features a façade of the papal palace in Castel Gandolfo, traditionally used by the popes as a place for vacation up until the beginning of the 1600s when Urban VIII made it his summer residence. The 1,00 euro postage stamp depicts the Palace of the Belvedere, currently part of the Vatican museums, built by Innocent VIII (1484-1492) and located at the far northern part of the Vatican Hill.
