9. Lenin’s Mausoleum
Location: Moscow, Russia
Cost: Original cost unknown; maintenance since 1924 estimated at $15 million
8. Humayun’s Tomb
Location: Delhi, India
Cost: 1.5 million rupees in 1569 (not enough data to adjust for inflation properly)
7. The Lincoln Tomb
Location: Springfield, Illinois
Cost: $180,000 in 1869
Cost adjusted for 2023 inflation: $4 million
6. Westminster Abbey
Location: London, England
Cost: £46,000 in 1246
Cost adjusted for 2023 inflation: $18.5 million
5. The Royal Mausoleum at Frogmore
Location: Berkshire, England
Cost: £200,000 in 1862
Cost adjusted for 2023 inflation: $39.6 million (or £31.1 million)
4. Emperor Nintoku’s Tomb
Location: Sakai Osaka, Japan
Cost adjusted for 2023 inflation: $300 million
3. Tomb of Mumtaz Mahal
Location: Agra, India
Cost: 32 million rupees
Cost adjusted for 2023 inflation: $422 million (or 35 billion rupees)
2. The Valley of the Kings
Location: Luxor, Egypt
Cost adjusted for 2023 inflation: $750 million
1. Great Pyramid of Giza
Location: Giza, Egypt
Cost adjusted for 2023 inflation: $5 billion