Bonjour!
1) The nineteenth century was called the Victorian Age because it was the period of Queen Victoria's reign.
2)''The sun never sets on the British Empire is an expression used to describe how powerfull was the British Empire.
3)The three greatest inventors were: William Fox ,who invented an early form of photograph , the colotype ; Alexander Bell ,who invented the telephone and Joseph Swan ,who invented the electric light bulb .
Le numero 4 je ne sait pas .