The anniversary stone is a memorial to the old Hardsyssel Ting (Thingstead). The stone was raised in 1974 on the occasion of the city's 700th anniversary.
It is made by Danish sculptor Eigil Westergaard, who among other things also made the Fire Monument in Søndergade. In addition, Ejgil Westergaard is the son of Thorvald Westergaard.