"Those who live in glass houses should not throw stones" is a proverb used in several countries, including England, Italy and Spain.

In England it was associated with the Union of the Crowns

Union of the Crowns

The Union of the Crowns was the accession of James VI, King of Scots, to the throne of England, and the consequential unification of Scotland and England under one monarch. The Union of Crowns followed the death of James' unmarried and childless first cousin twice removed, Queen Elizabeth I of...

. After London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

 was overwhelmed with immigrants from Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

, the Duke of Buckingham

Duke of Buckingham

The titles Marquess and Duke of Buckingham, referring to Buckingham, have been created several times in the peerages of England, Great Britain, and the United Kingdom. There have also been Earls of Buckingham.-1444 creation:...

organized a campaign against them in which they retaliated by smashing the windows of the Duke's mansion in St. Martin's Field. The mansion had so many windows it was nicknamed the "Glass House." This was not the origin of the proverb as it was used earlier in Italy and Spain.