Roy Hodgson parted company with Crystal Palace on Monday.
Hodgson became the oldest manager in Premier League history in March 2023 when he came out of retirement at the age of 75 years and 224 days for a second spell in the Selhurst Park dugout.
Palace finished 11th in the EPL last season but now sit 16th after taking just 24 points from 24 games in the current campaign.
Hodgson was said to be on the brink of being fired last Thursday when he was "taken ill" during a training session.
Palace confirmed on Monday that Hodgson was "now out of hospital and doing well" but also that he was no longer in charge.
Former Eintracht Frankfurt boss Oliver Glasner, 49, is widely expected to replace Hodgson.
Palace thanked Hodgson "for his outstanding service" in a club statement on Monday.
Hodgson said within the statement: "This club is very special and means so much to me and has played a big part in my footballing life. I have fully enjoyed my time here across six seasons, as it has given me the chance to work with top class players and staff doing what I love every day.
"However, I understand, given recent circumstances, it may be prudent at this time for the club to plan ahead, and therefore I have taken the decision to step aside so that the club can bring forward their plans for a new manager, as intended for this summer.
"I would like to thank Steve Parish and his American partners for their support, along with my coaching staff and backroom team who have helped me so much along the way. In particular, a huge thank you to my long-term friend and assistant, Ray Lewington; coaches Dean Kiely and Paddy McCarthy; plus the excellent sports science, video analysis and medical departments.
"My thanks and respect also to the current squad of players who have been a pleasure to work with - they are a credit to the club and themselves. I am certain that our fans will continue to give their full support to the team for the remainder of this season and beyond.
"I am confident that the season will finish well and I wish the team every success in the weeks, months and seasons to come."
Hodgson took charge of 200 Palace games in total, winning 66, drawing 48 and losing 86.
His final game in the job came 187 days after his 76th birthday.
After Hodgson, the next oldest manager in Premier League history is Bobby Robson, who ended his career at Newcastle aged 71 years and 192 days in August 2004.
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