In the course of the school's 125-year history, today's grammar school has housed a wide variety of school types and classes. Unfortunately, this cannot be traced without gaps. Here are a few examples:

• from 1875 - secondary school (Realschule)
• 1876 - secondary school and 2nd citizen school
• 1882 - The secondary school is moved to the school building on the Rotenberg and the 2nd district school is started.
• 1884 - 1890 - six-grade secondary school with progymnasium
• 1896 - relocation of the 2nd district school to the Tännicht School
• 1898 - secondary school and 4 classes of special school
• 1901 - secondary school and high school for girls
• 1905 - additional training school for girls (preparation for commercial profession)
• 1911 - reorganization of the school into a middle citizen school
• 1919 - abolition of preferred schools, Georgenschule became one of the three elementary schools in Meerane
• 1927 - Georgenschule as an eight-grade elementary school
• 1930 - inclusion of 4 independent auxiliary school classes.
• 1959 - transformation into a general polytechnic secondary school up to grade 8
• 1992 - 2003 transformation into Pestalozzi Grammar School
• Closure of the state high school in 2007
• Move-in of the European High School Meerane in 2005
• Since 01.08.2018 the European High School Meerane is under the sponsorship of the Saxony International School - Carl Hahn
• Since 01.01.2020 renamed to Internationales Gymnasium Meerane, short IGM

Sources:
Meerane Municipal Archives, yearbooks of the Pestalozzi-Gymnasium Meerane, yearbooks of the supporting association of the European Gymnasium Waldenburg.

Prepared by students of the school history working group:
Paula Bachmann, Lucas Borchardt, Alina Gerlach, Max Thimann, Chiara Ungerer