The rose garden (Rosarium) with its enormous variety of roses is the centre of attention on the Rosenhoehe, which came into being under Landgrave Ernst Ludwig. The hill became a park as early as 1810, when Grand Duchess Wilhelmine created a landscaped garden, with pavilions, swings and a tea house. The Rosenhoehe, with its old and new mausoleums, is also the final resting place of the families of the grand dukes.