Wikipedia https://en.wikipedia.org/wiki/Altstadt_(Frankfurt_am_Main)
More information on Frankfurt's official website http://www.frankfurt.de/sixcms/detail.php?id=2835&_ffmpar%5B_id_inhalt%5D=12690
Endereço 19 Saalgasse, Frankfurt am Main 60311, Germany
Coordenadas 50°6'34.776" N 8°40'56.467" E
