I think that this can be answered in multiple ways because there is not a right answer to this specific question. But I think that some characteristics is that they have be industrial, because if a place can not produce then it can not stand, and I also think that it is defined by how much power the city has economically and physically producing.
<span>Gutenberg's first prints are not known. His first, and best, known work was the printing of The Bible; now called The Gutenberg Bible.</span>