Johann Franz Encke was a German astronomer. Among his activities, he worked on the calculation of the periods of comets and asteroids, measured the distance from the Earth to the Sun, and made observations of the planet Saturn.

The Gelehrtenschule des Johanneums is a Gymnasium, or grammar school, in Hamburg, Germany. It is Hamburg's oldest school and was founded in 1529 by Johannes Bugenhagen. The school's focus is on the teaching of Latin and Ancient Greek. It is proud of having educated some of Germany's political leaders and some of Germany's notable scientists. The school is operated and financed by the city of Hamburg.