St. Paul's Cathedral is an iconic Anglican cathedral located in the heart of London, England. It was designed by the architect Sir Christopher Wren and built between 1675 and 1710, replacing the earlier St. Paul's Cathedral that was destroyed in the Great Fire of London in 1666.

The cathedral's iconic dome is one of the largest in the world, measuring 111 meters high, and it is one of the most recognizable symbols of London. Visitors can climb to the top of the dome and enjoy panoramic views of the city. The cathedral also has a large nave, choir, and transepts, as well as numerous chapels, a crypt, and a choir school.

St. Paul's Cathedral has played an important role in British history, serving as the site of many important events, including the funerals of Admiral Lord Nelson, the Duke of Wellington, and Sir Winston Churchill. It was also the site of the wedding of Prince Charles and Lady Diana Spencer in 1981 and the Diamond Jubilee Thanksgiving Service for Queen Elizabeth II in 2012.

The cathedral is open to visitors and offers guided tours, audio guides, and special events throughout the year. Visitors can also attend services, concerts, and special events in the cathedral, and the Whispering Gallery is a popular attraction where visitors can whisper along the walls of the dome and hear their voice echo.