Royal mail spokesman Andrew Hammond said: "This stamp issue illustrates the development of Buckingham Palace from the private house built by the Duke of Buckingham 300 years ago to one of the most iconic buildings in the world."
He added: "Buckingham Palace is one of the most recognised landmarks in the UK and is a source of pride to the nation; it forms a huge part of our heritage, so it's fitting Royal Mail has been able to dedicate a stamp issue to this most famous of addresses."
More top news
The one-year-old Yorkshire Terrier was attacked and killed while being taken for a walk.
The lifeboat crew carried the pair into their boat and dropped them off back at Tower Bridge as people watched from the riverside.
The huge painting took two graffiti artists thousands of hours to complete in east London.