Dark entrance of Salita Malacarne

There is a plaque on the house saying "1664". I don't think this covered passage would have been very nice back in those days: it looks to me very likely people would have emptied their chamber pots from the windows without thinking twice. Anyway, I drew the other side of the dark tunnel previously. This passage is called "Salita Malacarne" from the name of a famous surgeon/poet, born in the house above it in 1744.