This is the same arch as yesterday but seen to the exit. The display cases at the left were in 1757 used by traders in gold, silver and books and other fancy things. Around 1830 three of them were used by servants of the hospital to sleep on. Today they are all in use to sell books. Like in Paris they can be closed when not in use.
The arch is here seen next to the white building from the Oudezijdsachterburgwal ( a dutch streetname).