On Saturday and Sunday courtyards all over Fürth were open to visit. Zonebattler has written about this too, and with luck there will be more pictures there.

Zonebattler
Official brochure

For the time being, here is a panorama of Karolinenstraße 30 (click to enlarge):

and here are the usual denizens of that courtyard, shut indoors because there were so many visitors: