Photo: Matt Brown, CC BY 2.0 via Wikimedia Commons
Completed in 1633 to a design by Inigo Jones.
St Paul's Church is a Church of England parish church located in Bedford Street, Covent Garden, central London. It was designed by Inigo Jones as part of a commission for the 4th Earl of Bedford in 1631 to create "houses and buildings fit for the habitations of Gentlemen and men of ability". Initially serving as an auxiliary chapel for the St. Martin-in-the-Fields parish, it was raised to a parish church with a dedication to Saint Paul in 1646, as the Covent Garden district expanded. The church is nicknamed "the actors' church" by a long association with the theatre community, particularly in the West End.
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Once an important working market, and the backdrop for the musical My Fair Lady, Covent Garden today is a covered shopping mall with shops predominantly selling clothing, but also gifts and cosmetics, as well as stalls selling handicrafts (Tu-Su) or antiques (M), and restaurants. It's well worth a visit just for the attractive ambience, with classical musicians busking in the lower part of the market and a famous location for street entertainers. There is a popular pub, The Punch and Judy Tavern at the western end, with a large balcony overlooking a square where street entertainers perform. Most shops are open daily 10AM-8PM, but may close earlier on Sundays.
One of the world's great opera and ballet venues. Peak time tickets are like gold dust and it is very unlikely that a casual visitor will be able to obtain one. However, at least 65 tickets per performance are held off for on-the-day in person sales from 10AM, and tickets are sometimes available for off peak (especially matinee) performances and can be surprisingly affordable. Check the website or at London ticket agencies. Whilst there's no formal dress code for attending a performance, dressing smartly is advised. Casual styles (jeans, trainers) may get you disapproving looks from other attendees.
In many cities a local transport museum would be of very narrow interest - not London, however! London's public transport is iconic, and the story of how it developed from horse and cart through early buses, Tube trains and trolleybuses to the present day is well worth coming to find out about. There is plenty of opportunity to clamber aboard the historic buses and Tube trains on display. Also, because London's transport is so well known, the museum shop contains plenty of items that make interesting and original gifts and souvenirs.