The Johanneum is a Renaissance building, originally desingated as Stallgebäude mit Harnischkammer because it was constructed as the elite part of the electoral mews.
The Johanneum was built between 1586 and 1590 as Stallgebäude mit Harnischkammer, the elite stables of the adjacent Dresden Castle.
[2] The two halls on the building's ground floor provided space for 128 expensive riding-art horses imported in part from Italy.
The stands for the horses were decorated with spectacular horse-paintings, modeled after the Sala dei cavalli in Mantua's Palazzo Té.
[2] The upper floor was later changed in 1730 and 1731, when on Augustus II the Strong's request, the building was converted into a guest house and later into a painting gallery.