Baku Old City is the historical inner core of the capital, which is also the oldest part of it. Researchers still argue about its age. It's widely accepted that the city dates back to the 12th century, yet some people claim that some of its oldest buildings date back as far as the 7th century. The Old City of Baku is the first location in Azerbaijan to be named as a part of the World Heritage Site by UNESCO. A few years later, after a destructive earthquake, the place is also on the List of World Heritage in Danger.