Directions:

RR Station, Piazza delle Medaglie D'Oro - N44 30.34 E11 20.61
Museum Bombicci, where the "Fosforo di Bologna" specimens are housed, Piazza di Porta San Donato, 1 - N44 29.89 E11 21.35.
"Wall," where the wall of the city meets the road exiting the city to the south, Via San Mamolo - N44 29.18 E11 20.37
"1" = intersection of road - N44 28.46 E11 20.23.
Paderno muddy field, where specimens of "fosforo di bologna" were found - N44 26.73 E11 18.81.
Roncrio, another area where "fosforo di bologna" can be found - N44 27.20 E11.20.