 In the corner of Prästgatan and Kåkbrinken is a runestone set into the wall, which carries the inscription "Torsten and Frögunn had the stone erected after their son".The stone was probably brought to Stockholm to be used as building material, but it is not known from where.As the female name Frögunn is known as a pagan name, the stone is believed to date from around AD 1000, the stone thus being about 200 years older than the city.