when did the arch open
Construction on the Arch began in 1963 and was completed in 1965. Since it opened, the Arch has been one of St. Louisâ most popular attractions with millions of people visiting every year. Facts About the Arch: The Gateway Arch is 630 feet tall, making it the tallest national monument in the country. It is also 630 feet wide at its base and weighs more than 43,000 tons.