Gamla Stan is original Stockholm, what has it’s origin as town in 14th century. Mainly all houses in Gamla Stan have been built in 18th and 19th century. Primarily Gamla Stan consists of an island Stadsholmen. Surrounding islands Riddarholmen, Helgeandsholmen, and Strömsborg are officially part of Gamla Stan too, but not colloquially. North German architecture has had strong influence to the architecture of Gamla Stan.
In photos I took from the Western and Southern part of Gamla Stan are Göran Hälsinges gränd, Yxmedsgränd, Skräddargränd, Schönfeldts gränd, Tyska Brinken, Lejonstedts gränd and Kornhamnstorg. I walked in Stora Nygatan and took photos from the few meter wide alleys from both sides of it.