Uppland Runic Inscription 53, Norse runestone in Gamla Stan, Stockholm, Sweden

Uppland Runic Inscription 53 is a Norse runestone embedded in a wall in Gamla Stan, Stockholm's old town. The stone stands at waist height where Prästgatan and Kåkbrinken streets meet, integrated into the building facade.

The stone dates to the 11th century and bears a partial inscription mentioning Torsten and Frögunn as those who ordered it. They had it made to commemorate their son.

The inscription is carved in runestone style Pr4, the Urnes style, with slim, stylised animals interwoven into tight patterns. A cross-shaped engraving on the centre right was probably cut after the stone was finished to underline its Christian message. The commemorative text names Torsten and Frögunn, who had the stone erected after their son, whose name is lost.

The runestone is set into the corner of a residential building at the junction of Kåkbrinken and Prästgatan, with its carved face turned toward Prästgatan. An old decommissioned cannon barrel stands beside it, protecting the corner. The stone was taken out in 1937, cleaned and reinserted into the same wall in a position that is better protected and more visible.

A laser range scan in 2000 by Laila Kitzler Åhfeldt and Magnus Källström produced 3D charts of 16 grooves, showing deep, regular strokes of a master beside shallow, irregular ones of an apprentice. The cross may have been added after the stone was raised, when cutting became awkward.