Pat Rice is to leave the Club at the end of the season after a 44-year association with the Gunners.
He won the Double and the FA Cup as a player, returned to the Club as a coach and has most recently been Arsène Wenger's assistant manager.
Few people have given as much to Arsenal as Pat has and we asked the fans to send in their messages to the Arsenal legend.
Thousands of you from Kingston to Los Angeles got in touch and here are a selection of your tributes:
Thanks Pat. You'll be sorely missed on the touchline and running the warm up! Arsenal FC will be forever in your debt. Enjoy your retirement and supporting from the stands with the rest of us.
Helen Collins, London
Thank you for dedicating 44 years of your life (and possibly more) to this club. You have been through everything and I have huge respect for you! Enjoy your vacation.
Haris Suskic, Sweden
It has been a wonderful 44 years for Arsenal to have you with us. Thank you Pat. You are a true champion and could only wish you all the best for the future.
Yinlong Zhao, Dalian China
Arsenal is 125 years old. Pat has been part of 44 of those incredible years. What else can you say but thank you? An Arsenal legend in every sense.
Bonny Dellow, Huddersfield
Thanks for your time, effort and work. Thanks for everything. Over 40 years at our club is just phenomenal. All the best in the future. Will miss you Pat!
G Kaur, England
Thanks for all these years of passionate work for Arsenal.
Eric Balereau, France
I wish you every happiness in your retirement, Pat. When I first went to Highbury in 1978 you were still our right back. You have been a tremendous servant to the club we all love.
Philip Alden, Exeter
Pat, you truly are Mr Arsenal to me. My Dad supported Arsenal because of yourself and the rest of the Irish contingent in the 70s and felt affiliated to the club because of that connection coming from Ireland to London like yourself. You have overseen and played with some of the greatest players and teams this club have seen and that is a testament to yourself not only as a player but as a world class coach. Thanks for all your hard work at making Arsenal the club it is. Us Gooners all appreciate it and hope you have a great retirement. Thanks Mr Arsenal.
Sean Galvin, Highbury London
Thanks for everything Pat you are a true Arsenal legend and an absolute gent. Enjoy your retirement, you have earned it!
Pat you young man! You were still are and will be the best legend! Thank you for everything!
Baptist Joseph Pacheco, United Arab Emirates
The word 'legend' is bandied about a lot these days. But I honestly cannot find another more appropriate word to adequately convey what Pat Rice is to The Arsenal.
Pat, you are one of my favourites, it's so sad you're leaving us. I always watch you sitting beside Arsène and even when we are losing you still keep the faith and encourage the players. Please enjoy your retirement, we'll always feel your presence.
Humphrey Omozejele, Nigeria
Thank you for all your hard work. It won't be the same without you on the bench.
Happy retirement Pat, the loyalty and dedication you have shown to AFC is incredible.
Marc Cruise, Ireland
A million thank yous Pat for everything you have done for this great club. You scored in the first Arsenal game I ever attended vs Stoke in 1976.
John Bassett, Barnet
Thanks for all the memories Pat! Come visit America and tell Arsenal to tour here sometimes. Overall thanks for everything you legend!
John Tran, Los Angeles
Thank you Pat for everything you've done for the club. You will be truly missed.
Abubakar Waziri, Nigeria
Enjoy your retirement Mr. Rice! Going to miss seeing you on the bench! Thank you for all that you have done for the club we all love.
Nekesha Gayle, Kingston Jamaica
You will be remembered as an Arsenal legend Pat. Wonderful playing career followed by unstinting loyalty as a coach. Enjoy your retirement. Best wishes.
Martin Jordon, Newcastle
Thanks Pat for what you have done for far for Arsenal Football Club. As an Arsenal fan we will miss you.
Hi Pat, good job done over the years as a player and as a coach. Arsenal Football Club with its fans all over the world wishes you well in your retirement.