There is no particular year, but most castles had fires to keep warm. For more information on life in castles read this:
http://www.castles.org/Kids_Section/Castle_Story/inside.htm
middleages
the first castles were built in aroundAD900.
The Normans introduced the first proper castles, starting with the wooden Motte and Bailey castles to England following their victory at The Battle of Hastings in 1066.
Later castles were castles introduced in the beginning of the the Tudor period. They were not used as fortresses but as a kind of palace. Raglan castle is a famous Later Castle.
They were 1st introduced in China. The year is disagreed on. anywhere from 500bd to 11ad is what ive heard. -RO
sand castles live in Spain with gorillas
They have thick stone wallsThey have fire as there heating
As fortification, to repel potential invaders. Also, they were good publicity.
the castles that were back in medieval started in 2012 :)
They stopped being effective when gunpowder was introduced
No, traditional castles did not have electricity as they were built before the discovery and harnessing of electricity. Modern castles or castle-like structures may have been retrofitted with electricity for lighting, heating, and other modern amenities.
1847