The Renaissance is a period in the history of Europe beginning in about 1400, and following the Medieval period.
"Renaissance" is a French word meaning "rebirth". The period is called by this name because at that time, people started taking an interest in the learning of ancient times, in particular the learning of Ancient Greece and Rome. The Renaissance was seen as a "rebirth" of that learning. The Renaissance is often said to be the start of the "modern age".