Ferrara Cathedral

Hexagram on the Romanesque Cathedral of Ferrara, Emilia Romagna, Italy. Built in the 12th century.
Picture is courtesy of "padesig', who published it in Flickr and wrote the caption in Italian, which I don't understand; so I let Alta Vista Babel Fish do the job and here's what came up:

In the facade of the cathedral of Ferrara: what is one senz' other unusual one, but for me also much beautiful one... It seems is "an official" acknowledgment of the job and the contribution offered from the Jewish community of the time to the construction of the cathedral, but also an acknowledgment of the cultural and social importance that had the community in the period extensive