Johan Marius Nicolaas Heesters, known professionally as Johannes Heesters, was a Dutch actor of stage, television and film, as well as a vocalist of numerous recordings and performer on the concert stage with a career dating back to the 1920s. He worked as an actor until his death and is one of the oldest performing entertainers in history, performing shortly before his death at the age of 108. Heesters was almost exclusively active in the German-speaking world from the mid-1930s and became a film star in Nazi Germany, which later led to controversy in his native country. He was able to maintain his popularity in Germany in the decades until his death.

Amersfoort is a city and municipality in the province of Utrecht, Netherlands. As of 31 January 2023, the municipality had a population of 160,902, making it the second-largest of the province and fifteenth-largest of the country. Amersfoort is also one of the largest Dutch railway junctions with its three stations—Amersfoort Centraal, Schothorst and Vathorst—due to its location on two of the Netherlands' main east to west and north to south railway lines. The city was used during the 1928 Summer Olympics as a venue for the modern pentathlon events. Amersfoort marked its 750th anniversary as a city in 2009.