Architecturally, the city is known for its half-timbered mansions built by its prosperous merchants. The European Commission has concluded that the citizens of Aalborg are the most satisfied people in Europe with their city. The area around the narrowest point on the Limfjord attracted settlements as far back as the Iron Age leading to a thriving Viking community until around the year 1000 in what has now become Aalborg. Aalborg traces its history back over a thousand years. It was originally settled as a trading post because of its position on the Limfjord. The sites of what were two settlements and a burial ground can be seen on Lindholm Høje, a hill overlooking the city. The first mention of Aalborg under its original name Alabu or Alabur is found on coins from c.