His masterpiece is Holy Cross Minster, an influential milestone of late Gothic architecture in the town of Schwäbisch Gmünd, Baden-Württemberg, Germany.

[5] Rounded pillars with leaf wreath capitals, elongated tracery windows, and complex colored vaults are the first tangible evidence of his new style, which became even more pronounced with the laying of the foundation stone of the choir in 1351.

The number of required internal support columns was therefore reduced and the aisles were built as tall as the nave, creating an expanded sense of space.

[10] He may also have had a hand in the design of Ulm Minster, begun in 1366 and today the tallest church in the world,[11] although his family members are more clearly documented as carrying forward the work.

[13] What became known as the "Parler style" spread across central Europe and can be seen at St. Martin's Church, Landshut; St. Lorenz, Nuremberg; St. George's Minster, Dinkelsbühl; St. Stephen's Cathedral, Vienna; and numerous examples throughout the Hanseatic League from the Netherlands to Poland.