The First Church of Christ, Scientist is considered the Mother Church for the Christian Science church and was completed in 1894 with major additions in 1906; it boasts one of the world's largest pipe organs and has a sanctuary that seats 3000
St. Paul's Cathedral, built in Gothic Revival style and completed in 1905, was inspired by the Cologne Cathedral; Pittsburgh has roughly 300,000 residents while the metro area has 2.3+ million