Complex sentence: The North of England Institute of Mining and Mechanical Engineers was built amongst the richest buildings of the era, within Grainger's new town, having been built on the site of the medical school on land traditionally held by the Dukes of Westmoreland, the Nevilles.
Split into simpler sentences: The North of England Institute of Mining and Mechanical Engineers was built amongst the richest buildings of the era, within Grainger's new town. Built on the site of the medical school on land traditionally held by the Dukes of Westmoreland, the Nevilles.