The Florentine Shadow Florence breathes through the works of its many sons, and Fabrizio Boschi moves through its streets as a vital, if tempestuous, presence of the early-Baroque period. He does not merely paint; he imagines with a ferocity that contemporaries found difficult to contain. The records of his life suggest a man of intense temperament, a painter whose "persistent imagination" was matched only by a fiery spirit. He learned…