As of September 12th, Prince Charles will become the longest serving Prince of Wales of all time, having served 59 years, one month, and 15 days on the job. The 68-year-old Prince takes the title-related title from Edward VII, who would come to reign as King of the United Kingdom from 1901 to 1910. Edward was followed by King George VI, then briefly by King Edward VIII, then King George VI, and finally, by the current sovereign, Queen Elizabeth II.
When Prince Charles eventually takes the throne, he is set to take another royal record—the oldest king in English history. The title of Prince of Wales is traditionally given to the oldest son of the current monarch, and Charles is the 21st owner of the title in the kingdom’s history.
Prince Charles already took the title of least liked member of the royal family a few weeks ago (in large part because of what really happened between him and Princess Diana), so this new title might come as quite a comfort.