The building's name caused some head scratching back in Austust of 2001 because the The Belvedere is actually on Belvidere Street.
A Boston Globe article, discussed the spelling issue.
Most modern dictionaries prefer the developers' choice of Belvedere with an "e," but older dictionaries list the "i" spelling. The word itself has Latin and Italian origins. "Bel" or "bella," in Italian, means beautiful. "Vedere" means to see or view. "Bellus" is beautiful, and "videre" means to see or view in Latin."
A spokesman for the developer was quoted as saying,
"The truth is, we looked it up in the dictionary. We've built our whole design and marketing concept around the meaning of the word Belvedere and thought that actually spelling the word correctly was pretty important."
Globe article is available through the Boston Public Library's electronic resources.
BELVIDERE VS. BELVEDERE; [THIRD Edition]