HMS Sovereign of the Seas was a 17th century British Royal Navy first-rate ship of the line of 100 guns, later known as just Sovereign and then Royal Sovereign. It was built by Peter Pett (later a Commissioner of the Navy), under the guidance of his father Phineas,the king's master shipwright, and was launched at Woolwich dockyard on October 13, 1637.
As the second three-decked first-rate (the first three-decker being Prince Royal of 1610), she was the predecessor of Nelson's Victory, although Revenge, built in 1577 by Mathew Baker, was the inspiration providing the innovation of a single deck devoted entirely to broadside guns. She was the most extravagantly decorated warship in the Royal Navy,and the money spent making her helped to create the financial crisis for Charles I that contributed to the English Civil War.