Even the new building became too small when in 1980 the number of students reached 1,407, and again rooms in the nearby elementary school had to be occupied by Gymnasium girls and boys. In 1990 the school celebrated the 150th anniversary of its foundation and the 50th anniversary of Abitur exams.
The new building proved insufficient when the student count rose to 1,407 in 1980, requiring use of rooms at a nearby elementary school for Gymnasium students. In 1990, the school marked its founding anniversary and celebrated the Abitur exams' 50th year.