Which major works did Robert Browning write in his later years?

During his later years, Robert Browning wrote with great fluency, producing numerous long narrative and dramatic poems, as well as collections of shorter verse.1

His significant later works include:

• Long narrative or dramatic poems: Prince Hohenstiel-Schwangau (1871), Fifine at the Fair (1872), Red Cotton Night-Cap Country (1873), The Inn Album (1875), and the two series of Dramatic Idyls (1879 and 1880).1
• Classical subjects: Balaustion’s Adventure (1871) and Aristophanes’ Apology (1875).1
• Collections of shorter poems: Pacchiarotto and How He Worked in Distemper (1876), Jocoseria (1883), Ferishtah’s Fancies (1884), and Asolando: Fancies and Facts (1889).1
• Personal works: La Saisiaz (1878), a meditation on mortality, and Parleyings with Certain People of Importance in Their Day (1887), in which he reflected on the ideas and books that influenced him throughout his life.1

These works followed the publication of his most noted achievement, The Ring and the Book (1868–69).21