Appendix A of The Lord of the Rings contains historical background of the events in Middle-earth prior to the War of the Ring. Its main focus is on the Mannish kingdoms of Númenor, Gondor and Rohan, and on the Dwarves of the line of Durin. It also contains the story of Aragorn and Arwen.
The contents of Appendix A are as follows.
- The Númenorean Kings
- The Realms in Exile
- The Northern Line: Heirs of Isildur
- The Southern Line: Heirs of Anarion
- Eriador, Arnor, and the Heirs of Isildur
- Gondor and the Heirs of Anarion
- The Stewards
- The Tale of Aragorn and Arwen
- The House of Eorl
- The Kings of the Mark
- Durin's Folk
The Realms in Exile is a list of the kings of Arnor and Gondor, including the Chieftains of the Dúnedain and the Ruling Stewards of Gondor.
Eriador, Arnor, and the Heirs of Isildur contains the history of the Northern Kingdom, through the time Aragorn.
The Tale of Aragorn and Arwen traces the love story of that couple, including their deaths.
The House of Eorl relates the history of Rohan.