History of tennis royal families of Europe were besieged and real tennis was largely abandoned. Real tennis played a minor role in the history of the French Revolution, through the Tennis Court Oath, a pledge signed by French deputies on a real tennis court, which formed a decisive early step in starting the revolution. In England, during the 18th and early 19th centuries as real tennis declined, three other racquet sports emerged: racquets, squash racquets, and lawn tennis (the modern game). The modern sport is tied to two separate inventions. Between 1859 and 1865, in Birmingham, England, Major Harry Gem, a solicitor, and
Gibbon's Tennis Court in 1809. The London School of Economics, which covers most of Clare Market nowadays, retains some squash and real tennis courts in its older buildings. Tudor-style real tennis courts were long, high-ceiling buildings, with galleries for spectators; their dimensions — about 75 by 30 feet — are similar to the earlier theatres, and much larger than a modern tennis court. The tennis courts were not used exclusively for tennis. In 1653, seven years before it saw lawful use as a theatre, an underground production of Killigrew's "Claricilla" was planned for Gibbon's court. The production was broken up before it debuted,