After its completion in the 1300s, Old St. Paul’s Cathedral was one of the most elegant and imposing churches in all of Europe. Spanning approximately 585 feet in length and 100 feet in width, its architecture was a striking blend of Romanesque (Norman) foundations and later Gothic expansions. The crown jewel of its exterior was a magnificent wooden and lead spire. Before it was destroyed by lightning in 1561, the steeple reputedly soared to a height between 460 and 489 feet (140 to 149 meters), making it the tallest church in Great Britain and significantly taller than Sir Christopher Wren’s modern 365-foot dome.
Inside, the cathedral's most famous feature was its massive nave, featuring a Norman triforium and a beautifully vaulted ceiling. Over time, this space evolved far beyond religion to become known as 'Paul’s Walk'. In the 16th and 17th centuries, the nave transformed into a bustling secular marketplace, a public thoroughfare, a hub for political gossip, and a renowned market for London's booksellers.
The cathedral's stained glass windows were also celebrated as some of the finest craftsmanship in the country. Legendary poet Geoffrey Chaucer explicitly highlighted their intricate beauty in The Miller’s Tale within The Canterbury Tales:
His rode was red, his eyen grey as goose,
With Paule’s windows carven on his shoes
In hosen red he went full fetisly.