Was Altair a real person?

Related questions

1. How can I get Assassin's Creed Unity for free?
2. Is Ezio related to Edward?
3. Who killed Desmond Miles?
4. Can I run Assassins Creed Unity?
5. Should I play the Assassin's Creed games in order?
6. Is Ezio related to Altair?
7. Why is Altair missing a finger?
8. What is the story of Assassin's Creed Black Flag?
9. What language does Altair speak?
10. Was Edward Kenway a real pirate?

Tags

1. #fictional
2. #castle
3. #firenze
4. #based
5. #auditor
6. #syria
7. #concept
8. #brotherhood
9. #masyaf
10. #altair
11. #assassins
12. #historians
13. #assassin
14. #place
15. #which
16. #called
17. #there
18. #discovered
19. #because
20. #modern
21. #creed