Linked from
The 22 pages that link to Ur, each with the reason it gives.
Ur-NammuRelated: Ur-Nammu made this city the seat of his dynasty.
EnheduannaRelated: Enheduanna served as high priestess at Ur, a major center of Nanna’s worship.
Code of Ur-NammuRelated: The king associated with the code ruled from this city.
NabonidusRelated: Nabonidus restored its temple as part of his support for Sîn’s worship.
GutiansRelated: Ur became the center of the dynasty that followed Gutian dominance.