LEGO 1958 / System i Leg Sets

System i Leg, which translates to System of Play, was the natural progress of LEGO Mursten and is the foundation of L:EGO sets today. Designed by Godtfred Kirk Christiansen who organized the existing LEGO Mursten sets and modeled new designs around a single, common theme - a townscape or street scene. After nearly a year of development the result was the LEGO Mursten System i Leg (System of Play). The System i Leg was unveiled at the Nürnburg Toy Fair in February 1955. The original Automatic Binding Bricks sets and then LEGO Mursten sets were continued to be manufactured under the System i Leg theme.

1958 LEGO Sets

1958 was one of the most significant years in LEGO history. Following the death of founder Ole Kirk Christiansen, leadership passed to his son, Godtfred Kirk Christiansen. Most importantly, LEGO patented the modern stud-and-tube brick design, giving the LEGO System its enduring clutch power and near-unlimited stability. This breakthrough replaced earlier hollow-bottom bricks and defined the universal compatibility that remains today. LEGO also unified its packaging under the ‘LEGO System’ name, dropping multilingual text in favor of a consistent global identity.