Extract all of the dates mentioned in this paragraph and list them using bullets in the format {Date} - {Description}

The Old Thatch Tavern became the brewery for Stratford-upon-Avon in 1470 when it was also a pub. It has been a licensed pub since 1623 and it is claimed that it is the oldest pub in Stratford.

• 1470 - when the Old Thatch Tavern became a brewery
• 1623 - when the Old Thatch Tavern became a licensed pub