‘Opus Majus’ is written by-

• 'The Opus Majus' Roger Bacon রচিত।
- এটি Medieval Latin ভাষায় রচিত।
- Roger Bacon ছিলেন একজন philosopher, educational reformer এবং scientist.
- He was the first European to describe in detail the process of making gunpowder.
- He proposed flying machines and motorized ships and carriages.

• Notable works:
- Compendium Philosophiae,
- Opus Majus.

Source: Britannica.