This is quite interesting. An artist engraved a view of London Bridge in 1616, and another artist has updated it for 2016 using the same style. There's a bunch more on the page, including St Paul's Cathedral across the Thames (you use the little blue slider to switch between 1616 and 2016). At the very least, the older images look great for use in a fantasy RPG!
http://www.theguardian.com/cities/2...urce=fark&utm_medium=website&utm_content=link
http://www.theguardian.com/cities/2...urce=fark&utm_medium=website&utm_content=link