Mansion House, London

The Mansion House is the official residence of the Lord Mayor of London. It is a Grade I listed building. Designed by George Dance in the Palladian style, it was built primarily in the 1740s. The Mansion House is used for some of the City of London's most formal official functions, including two annual white tie dinners. At the Easter banquet, the main speaker is the Foreign Secretary, who then receives a reply from the Dean of the Diplomatic Corps, i.e., the longest-serving ambassador. In early June, it is the turn of the Chancellor of the Exchequer to give their "Mansion House Speech" about the state of the British economy. The most famous was the Mansion House Speech of 1911 by David Lloyd George, which warned the German Empire against opposing British influence during the period leading up to the First World War.

Country house data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).