Semiramide is arguably the greatest Rossini opera not to be regularly performed today. This does not mean, however, that it has been entirely neglected, and it was recently recorded, and performed at the BBC Proms, by Opera Rara on period instruments. Musicologist Rodolfo Celletti has suggested that ‘Semiramide was the last opera of the great Baroque tradition: the most beautiful, the most imaginative, possibly the most complete; but also, irremediably the last’. This is...