The Sixth Dynasty of ancient Egypt lasted from around 2325 to 2150 BCE and is part of the Old Kingdom period. It is known for its strong central government and the continuation of pyramid building, with notable structures like the Pyramid of Teti. This dynasty saw the rise of powerful pharaohs who emphasized the importance of the afterlife and religious practices. During the Sixth Dynasty, the role of the vizier became increasingly important, overseeing administration and local governance. The period also experienced economic challenges and social changes, leading to a gradual decline in centralized power, which eventually contributed to the end of the Old Kingdom.