Original: Roxburgh, Scotland - abandoned in the 15th century Rungholt – Wadden Sea in Germany, sunken during the "grote Mandraenke", a storm surge in the North Sea on January 16, 1362 Saeftinghe, Netherlands - prosperous city lost to the sea in 1584.
Simplified: Saeftinghe, Netherlands - prosperous city lost to the sea in 1584.