I would say camera it was invented by Ibn ul Haitham.
In the last decade of the 18th century, both France and England experienced revolutions. In France it was a political revolution against the Old Order, and in England it was an economic revolution that changed the way wealth was produced and shared.
There is a higher population in the city than the countryside, which allows for more ideas to be developed and spread
The second pillar, Salat, because Salat is the pillar of prayer.