Which era of egypt marked the appearance of the pyramids?

The Old Kingdom of Egypt marked the appearance of the pyramids which was approximately from 2686 BC to 2134 BC. 

Born in braintree (present-day quincy),  massachusetts, on october 30, 1735, john adams was the oldest of john and susanna boylston adams’ three sons. the elder adams was a farmer and shoemaker who also served as a congregationalist deacon and an official in local government