A town hall is often intended to represent the city that it is in—a point of local pride, as large as possible given the local finances. But when the town is tiny and money short? You might just end up with Europe’s smallest city hall. Sigtuna was once the capital of Sweden and one of the country’s biggest and most bustling cities. However, that was a millennium ago, and the capital has since moved twice, to from Uppsala and then Stockholm. When the king left, most of the rich and…