Gamla Stan, the Old Town, is one of the largest and best preserved medieval city centers in Europe, and one of the foremost attractions in Stockholm. This is where Stockholm was founded in 1252.
All of Gamla Stan and the adjacent island of Riddarholmen are like a living pedestrian-friendly museum full of sights, attractions, restaurants, cafés, bars, and places to shop. Gamla Stan is also popular with aficionados of handicrafts, curious, and souvenirs. The narrow winding cobblestone streets, with their buildings in so many different shades of gold, give Gamla Stan its unique character. Even now cellar vaults and frescoes from the Middle Ages can be found behind the visible facades, and on snowy winter days, the district feels like something from a storybook.
https://www.visitstockholm.com/see--do/attractions/gamla-stan/