It takes up the site of Lord's (MCC's) Old Cricket Ground, which lasted 23 years until the 1811 season.
It is one 84-metre block north of Marylebone Road and lends its name to the roads on all four sides, in typical fashion — the east side forms a pause in the numbering and scope of Gloucester Place; the west does so as to Balcombe Street.
The south side links: Dorset Square takes up (1787-founded) Lord's Old Ground the closure of which at the end of 1810's season was brought about by a sought rent increase.
1 currently houses the London branch of Alliance Française but during WWII functioned as its international headquarters when the original in Paris was closed.
[4] A plaque by the front door commemorates the building's history as the site from which agents of the French Resistance were equipped for, and dispatched to, undercover missions in Occupied France.