Describe the process of building the pyramids.

Quarrying the blocks. ... However, it is unclear which quarry was used for Khafre'spyramid. When nearly complete, each of the Giza pyramids was furnished with a smooth outer casing made of limestone. Little of this outer casing remains today, having been reused for other building projects in Egypt over the millennia.

In 911, a group of vikings lead by rollo besieged paris and chartres. after a victory near chartres on 26 august, charles decided to negotiate with rollo. the talks were led by hervé, the archbishop of reims. this resulted in the treaty of saint-clair-sur-epte, which granted rollo and his soldiers all the land between the river epte and the sea. it also granted him brittany, "for his livelihood". at the time, brittany was an independent land which france had not been able to conquer. in exchange, rollo promised the king his loyalty and military assistance when needed. also rollo also agreed to be baptised and to marry gisela, the king's daughter. the territory given rollo is about the same as upper normandy. this would grow to become normandy under rollo's descendants. - wikepedia