The hotel will be located within the former Fine Arts Theatre, in the Amara district of the city.
The total contract value is almost 2.5 billion euro for the first 130 trains and their maintenance for over 30 years.
The bids came in slow and on the last day of the auction the highest bid was accepted.
ECE will continue to be responsible for the management of the center.
The fund has already secured exclusivity on two separate deals in the living and office sectors.
Greek banks posted elevated after-tax losses in 2021, amounting to €4.8 billion.