Woolsthorpe Manor in Woolsthorpe-by-Colsterworth, near Grantham, Lincolnshire, England, is the birthplace of Sir Isaac Newton and his family home.

However, by the 17th century the manorial rights had been largely eroded and the house acted more as a yeoman's farmstead, principally rearing sheep.

[3] Newton returned to Woolsthorpe in 1666 when Cambridge University closed owing to the plague, and performed many of his most famous experiments there, most notably his work on light and optics.

[5] Now in the hands of the National Trust and open to the public except in winter, it is presented as a typical seventeenth century yeoman's farmhouse (or as near to that as possible, taking into account modern living, health and safety requirements and structural changes that have been made to the house since Newton's time).

Isaac Newton recounted to his contemporary William Stukeley how an apple tree in the orchard inspired him to work on his law of universal gravitation.