Rossini’s Aureliano in Palmira is a rarity for a whole host of reasons. There’s no definitive edition. Many of the extant scores have much easier versions of the main arias for the tenor titular character. Quite a bit of the music was reused for Il barbiere di Siviglia, often in ways that seem quite odd after hearing it in its original context. Finally, the plot is a bit thin. Not that that usually worries bel canto aficianados.
Ciro in Babilonia is an early work by Rossini composed for the lenten season when only works on biblical/religious themes were permitted. This doesn’t really fit that description. Sure, the story of Belshazzar and the writing on the wall gets a brief look in but it’s almost interpolated in the story, from Herodotus, of Cyrus’ capture, together with wife and child, by Belshazzar. It’s a tale of arrogant kingship, religious faith and marital devotion. Typical opera seria stuff really. It’s a bit thin plot-wise though which probably explains its relegation to obscurity. This first modern production was created at Caramoor, then translated to the Rossini festival at Pesaro, where it was recorded in 2012.