Violetta di Parma was said to have been created by the monks at the Monastery of the Annunciata for Marie Louise, the second wife of Napoleon Bonaparte. In 1870, Lodovico Borsari obtained the formula and launched his own perfume line with the fragrance.
Violetta di Parma is a simple fragrance, only lightly sweet, with green notes and a hint of earthiness. It is not a startlingly beautiful perfume, nor would I go so far as to call it interesting. The first time I tried it, I thought it was nice but perhaps no big deal, and it was only later, after trying a myriad of other violet fragrances, that I decided it was perfection, largely because of what it is not: it is not powdery, or dark & musty, or candy-sweet.
It an Eau de Parfum, and has minimal sillage but good lasting power. It layers nicely with other simple scents. I think I have already mentioned that it works well with Comme des Garçons Calamus, and it is also very nice with Diptyque Tam Dao.
Borsari also makes a violet-based mixed floral, Bouquette di Violette, with rose, lily of the valley, iris, and hyacinth. I have not tried that one, but please comment if you have.
For buying information, see the listing for Borsari under Perfume Houses. You can also sometimes find bargain prices at ebay, and occasionally at TJ Maxx, which is where I found mine. Borsari also sells collections of miniatures, and these are worth looking for as the larger sets include fragrances which are difficult to find elsewhere, such Corteccia di Pino (a lovely pine scent) and Acqua Classica (a fresh citrus with oakmoss).