Reichmann brothers

The Reichmann family (Hebrew: משפחת רייכמן) is a Jewish-Canadian family best known for their property empire built through the Olympia and York company. At the family's peak, their combined wealth was estimated at $13 billion making them the fourth-richest family in the world. The family's fortunes eventually waned, particularly with the ill-fated Canary Wharf development, which saw the family business file for bankruptcy in 1992 with debts of $20 billion. The family's wealth partially recove... source: https://en.wikipedia.org/wiki/Reichmann_family