Ludwig V had today's royal stables built directly on the Neckar in 1510.
The name Marstall goes back to a Renaissance building on the south side of the courtyard, destroyed in 1693, which Count Palatine Johann Casimir had built in 1590. Today, the Marstall complex - one of the few buildings in Heidelberg from the late Middle Ages that has been rebuilt several times - houses the central Old Town canteen as well as event rooms and the administration of the student union.
To the east of the marshal's house rises the building of the Heuscheuer (hay barn), built of quarry stone masonry. Its origins also lie in the city's defence. Here, in the middle Ages, stood the mantle or women's tower of the north-western corner bastion. After its destruction in 1693, the storage building was built, covered with a Baroque crippled hipped roof, which stored hay for the neighbouring stables until 1824, and later served as the municipal storehouse. In 1963-65, the hay barn was converted into a lecture hall building for the university.