To be clear, "the Belvedere" comprises an entire complex of both the "upper" and "lower" Belvedere and formal gardens between them. The Lower Belvedere can also be thought of (perhaps unfairly) as the "lesser" Belvedere of the two. The lower Belvedere faces the city centre and is entered directly from the street (Renweg), and it is here that you would buy your tickets and be admitted into the whole Belvedere complex. The Lower Belvedere was where construction of the complex started in the 1710s as a summer pleasure palace for Prince Eugene of Savoy, the celebrated courtier and Generalfeldmarschall of the Army of the Holy Roman Empire. Later in the 18th century it would eventually pass to the imperial family and then - following the dissolution of the Empire - the republican government. You should certainly visit the Upper Belvedere for the excellent art museum, but give the Lower Belvedere some love if you want something off the beaten track. It has a series of temporary exhibits that have featured the likes of Klimt and Dali in the recent past. One thing you should check out at the Lower Belvedere is the elegant Baroque orangery, which nowadays features parts of the exhibit. The lower palace is an excellent example of Late Baroque architecture, featuring interconnected ceremonial rooms and richly adorned interiors, including excellent ceiling frescoes depicting Prince Eugene receiving honours from the Pope himself. The red marble hall is a stand out of any visit. For something more deliciously Viennese, do check out the fanciful and mirrored "hall of grotesques". The Vienna Pass gets you into Lower Belvedere for free. Lockers and cloak room provided (they require a euro coin).