LEGO Town Plan was a theme introduced in 1958 and lasted until 1966 and was under the System i Leg (System of Play) theme. The theme was unveiled at the Nuremberg Toy Fair in February 1955. LEGO Town Plan originally consisted of the existing 700 series LEGO Mursten sets, several new HO 1:87 scale accessories, and a vinyl play mat. However, over the next several years the system was expanded with both new building sets.
1955 LEGO Sets
1955 was a very important year for LEGO. In this year, Godtfred Kirk Christiansen attended both the attended the London and Nuremberg Toy Fairs where he eventually came up with the LEGO System of Play and the now classic Principles of Play. These principles were issued to every LEGO employee in 1962 and still stand as the core principles of the company. Godtfred 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 (System of Play) was unveiled at the Nürnburg Toy Fair in February 1955 but the reaction was less than positive.