Chicken grit should not be confused with a calcium supplement like oyster shell. Grit is for the purpose of aiding in digestion. Oyster shell is for the purpose of adding calcium to your laying flockâs diet. Calcium is the main component in egg shells and is an important element to supplement into your henâs diet.
Castles. The Normans were master castle builders. After 1066, England witnessed a massive castle building programme on the orders of William the Conqueror. First, motte and bailey castles were built.Once William had firmly established his rule in England, he built huge stone keep castles.By the time of Edward I, concentric castles were being built.fter 1066, England witnessed a massive castle building programme on the orders of William the Conqueror. First, motte and bailey castles were built.
For example, when Tattershall Castle was built between 1430 and 1450, there was plenty of stone available nearby, but the owner, Lord Cromwell, chose to use brick. About 700,000 bricks were used to build the castle, which has been described as the finest piece of medieval brick-work in England.he castle builders of Western Europe were aware of and influenced by Roman design; late Roman coastal forts on the English  Saxon Shore  were reused and in Spain the wall around the city of Ãvila Ã¡vila Imitated roman architecture when it was built in. 1091