Sheikh Mansour's billions built a house called the Etihad to help lure Pep Guardiola to Manchester.
But almost four seasons later serious cracks are starting to appear inside the kingdom ruled from Abu Dhabi, but governed here by Guardiola.
Since 2016 all Guardiola has done is look down from the top of English football and enjoy the view.
With the exception of Liverpool, he's struggled to make out the rest in the distance after winning five major trophies (seven if you include Community Shields), including back-to-back Premier League titles and a historic domestic treble last season.
While the 2020 title is heading to Anfield, Manchester City remain in three cup competitions this time round and could still go on to trouser another treble of silverware.
There is no crisis at Manchester City, by any stretch of the imagination, despite what some people might claim.
But what is clear is that the balance of power in English football has shifted down the East/Lancs Road to Merseyside, where Jurgen Klopp has built a formidable side.
Klopp has already tucked away the one trophy that continues to elude Guardiola at City in the shape of the Champions League - and is now set to dethrone the Spaniard as the king of domestic football too.
Klopp's remarkable team are now the point of reference in both English and European football and for the first time Guardiola finds himself sat in the shade looking up at someone else.
He isn't sitting comfortably, either. Not if his increasingly erratic and unpredictable behaviour of recent months is anything to go by.
While acting like Basil Fawlty on the touchline, Guardiola has also been moody and sullen, with a growing appetite for picking fights that can - and should - be avoided.
'He could cause a scrap in an empty room' was how one source close to Guardiola recently described his current state of mind. Former Premier League chief executive Richard Scudamore and the City fans will relate to this.
His clash with them over empty seats at the Etihad showed naivety as well as niggle. If he has a problem with supporters staying at home, he should question why club bosses have increased the price of season tickets in 10 of the last 11 seasons?
City's 2-0 defeat at Tottenham on Sunday was their sixth of the season. Guardiola has never lost as many league games in a single campaign during his managerial career - and his side now trail Liverpool at the top by a staggering 22 points.
He has failed to address the loss of Vincent Kompany last summer, while the problem of how to replace Sergio Aguero is starting to loom large.
But Guardiola's biggest problem is how to reign in Liverpool and swing the pendulum back in City's favour.
On paper it looks an almighty challenge because he will know Klopp has moulded a team to last - and despite denying reports he could take another sabbatical from football this summer, doubts remain about whether he has the stomach and drive to build again.
At Barcelona and Bayern Munich, Guardiola invested so much intensity into the roles he drove himself to exhaustion, so can he muster the energy to catch and overhaul Klopp?
Sheikh Mansour's biggest fear is when the time comes for Guardiola to hand back the keys because, like Manchester United have found after Sir Alex Ferguson, following greatness with greatness is nigh on impossible - no matter how rich you are.