The 33-year-old helped Quins win their first ever Premiership title in 2011-12 and was also in the side that lifted the Challenge Cup a year earlier.

Robshaw won the most recent of his 66 England caps in June 2018 but was left out of last year's World Cup squad.

"I could never have imagined I would be fortunate enough to play for the team I admired the most," he said.

"Though there is so much I will miss about playing for this team, I will always be eternally grateful and proud for having had the chance to stand alongside such extraordinary players."

Robshaw added that he "looks forward to the next chapter" but has yet to decide whether he will continue playing.

He has made 203 Premiership appearances for Harlequins, 14 of them this season, with former England scrum coach Neal Hatley last year saying the flanker was in "as good a shape as we've seen him".

"In terms of what I'm going to do next, I'm still not sure," Robshaw told Talksport.

"I still don't know what the next chapter is, whether in a rugby capacity or a post-rugby capacity."

Chris Robshaw skippered Harlequins to their maiden Premiership title

Back-rower Robshaw was a late omission from the Harlequins side that reached the Premiership Rugby final on Sunday through illness.

He was named Premiership player of the year in the London side's title-winning season - scoring a try in their Twickenham victory over Leicester - and also won the individual award in 2008-09.

"Despite all the intense training hours, and the emotional and physical demands of the job, it never felt like work," Robshaw added in a statement on Twitter.

"Putting on the Harlequins shirt will always remain the greatest privilege of my professional career."