Why was Queen Mary called Bloody Mary?

Related questions

1. How did Queen Mary the first die?
2. Who killed Bloody Mary?
3. Is Queen Mary bigger than the Titanic?
4. When was Queen Mary Queen?
5. Why did Queen Elizabeth never marry?
6. Who was Queen Mary to Queen Elizabeth?
7. Was Queen Mary Queen Elizabeth's grandmother?
8. Was Queen Mary a good queen?
9. How did Mary the first die?
10. Where did Queen Mary live after her husband died?

Tags

1. #religious
2. #throne
3. #stake
4. #death
5. #elizabeth
6. #after
7. #england
8. #bloody
9. #sister
10. #disagreeing
11. #people
12. #burned
13. #which
14. #almost
15. #again
16. #called
17. #recorded
18. #protestant
19. #martyrs