...and here's what the Professor (or was it the Madman) thought about gloriette: Hist. [a. F. gloriette. Cf. Sp. glorieta.] A highly decorated chamber in a castle or other building. Also attrib.

?a1500 Obituary in Willis Monastery Christ Ch. Canterb. (1869) 107 note, Edificavit turrim quandam, cameræ Prioris vocatæ La gloriet contiguam.] 1839 Longfellow Hyperion i. vi. (1865) 30 Rodolph's ancient castle, with its Gothic gloriette and fantastic gables. 1884 Athenæum 13 Sept. 330/3 Besides an Oriel or a ‘Gloriet’ Tower, a mediæval castle contained many a ‘cruel habitation’

I had pictured something like a crude palace inside the castle walls. have we mentioned the keep? (also known as the donjon, to distinguish it from the modern sense of dungeon.)