Premise: Vaxholm Municipality ("Vaxholms kommun" or "Vaxholms stad") is a municipality within Stockholm archipelago in Stockholm County in east central Sweden. The municipal slogan is "Vaxholm – the capital of the archipelago", due to its central location in the archipelago. Its seat is located in the city of Vaxholm.
Hypothesis: The Voxholm Municipality is called "the capital of the archipelago" because of its large size.