The building's west wing suffered a fire in 1877, destroying some 87,000 patent models; it was restored by Adolf Cluss, 1877–1885, in the style he termed "modern Renaissance".
The western part of the structure suffered a conflagration in 1877, resulting in the loss of about 87,000 patent models; it was renovated between 1877 and 1885 by Adolf Cluss, who employed his own unique architectural approach, which he termed "modern Renaissance".