Across
- 4. a tool used to study the sky
- 5. a famous doctor
- 7. the city where the house of wisdom is located
- 8. the time of islamic civilsation
- 9. a journey where people sold and bought things
Down
- 1. a famous library
- 2. special writing used in art
- 3. numerals the numbers we use today
- 6. What maths topic was invented?