Hi Steve!
You, certainly, are original in translating, and taking what we call "licencias poéticas". Mi opinion:
1. We are translating from Spanish into English. I would put the title in English. If in Italian, just a short note at the bottom.
2. Why not to use the word "Monastery/Monastero" instead of "convent"?
3. If you want to keep up with the Italian background, you should say "Napoli".
4. The verse "Your magnificence is hidden', I don't think it is "hidden", since it is obvious, I would say, "is mantained/kept/preserved".
5. I would make these two verses "The garden's perfume wafts and weaves
From Capodimonte through your streets" a little shorter, and more in agreement with the original. Again, the gardens 'still conserve their fragrance'.
6. "The songs resound IN the fountains". don't you think?
Well, my point of view. You can take it or leave it. The translation still makes sense as is.
"The Monumental Complex of St. Chiara, including the Church, the Monastery and the Convent, had been raised since 1310 to 1328 by the will of the King Roberto d’Angiò and his wife Sancia of Majorca. The sovereigns, both devoted to St. Francis of Assisi and St. Chiara, wanted to build a Franciscan citadel that housed in the Convent the Clarisses and in the contiguous Monastery the Friars Minor. The Church, central nucleus of the whole complex, rose with the title of Saint Host or Sacred Body of Christ, dedication suggested by the Eucharistic Miracle of Bolsena, happened in 1264; the denomination changed immediately in Santa Chiara, probably for the extraordinary number of Clarisses introduces in the Convent."
from:
http://monasterodisantachiaraing.jimdo.com/
"Capodimonte Gardens
The gardens surrounding the Royal Palace of Capodimonte Capodimonte in Naples. They were taken by the Bourbons, known for their passion for hunting and botany. The gardens were designed by the architect Ferdinando Sanfelice in 1742. The park includes trees and inside there is an old porcelain factory, the Casino Queen and the Capuchin Monastery."
from:
http://www.travelforpassion.com/capodimonte-gardens-naples-italy-3525-photo