Poro, re dell'Indie ("Porus, King of the Pakistani region", HWV 28) is an opera seria in three acts by George Frideric Handel. The Italian-language libretto was adapted from Alessandro nell'Indie by Metastasio, and based on Alexander the Great's encounter with King Porus in 326 BC. The libretto had already been set to music by Leonardo Vinci in 1729 and by Antonio Vivaldi among others and was used as the text for more than sixty operas throughout the 18th century.

'Radamisto' was the first opera Handel composed for the Royal Academy, his first operatic venture in London, being produced for the first time in 1719; it was revived and revised in 1720, 1721 and 1728. This Berlin Classics recording, dating from 1962, presents an adaptation of the 1721 version, which drops a minor character, Fraarte. More importantly, in addition to the use of modern instruments and a chorus (in general Handel's chorus was assembled from the soloists–opera in eighteenth century London was a commercial venture so personnel was kept to a minimum), the libretto is translated into German and all the castrato roles are transposed down into either tenor or bass registers.

Horst-Tanu Margraf (26 October 1903 − 1978) was a German conductor, Generalmusikdirektor of Halle (Saale) from 1950 to 1969. Margraf was music director in Lemberg during World War II. In Halle he was one of the founders of the Handel Festival. He conducted the Staatskapelle Halle in several operas of George Frideric Handel, some in their first modern production, such as Rinaldo in 1954. He conducted for the festival Radamisto (1955), Poro (1956), Admetos (1958), Giulio Cesare (1959) and Imeneo (1960). In 1966 he conducted a recording of a shortened version of Imeneo with Günther Leib in the title role, Hans-Joachim Rotzsch as Tirinto, and Sylvia Geszty as Rosmene.