Here, we take a look back at Arsenal's seasons under Wenger.
After taking charge of the club on September 30, Wenger signed a young Patrick Vieira and Nicolas Anelka while guiding the team to third - their hopes of a title challenge ended by a poor run in February. They missed out on a place in the Champions League on goal difference alone.
After strengthening his team with Marc Overmars and Emmanuel Petit, Wenger guided Arsenal to their first title in seven years despite trailing Manchester United by 12 points at the end of February. They then beat Newcastle in the FA Cup Final to record their first double since 1971.
Arsenal would be second best to Manchester United in this season, losing the title by a single point, and losing the FA Cup semi-final in extra-time to Sir Alex Ferguson's side courtesy of Ryan Giggs' famous goal.
Anelka was sold to Real Madrid, but the arrival of Thierry Henry from Juventus began a new era at the club. There were also major changes at the back, with Steve Bould retiring and Nigel Winterburn dropping down the pecking order - the end of the old guard. Their replacements were only good for the runners-up spot again.
Robert Pires and Sylvain Wiltord were among the summer arrivals, but Overmars and Petit left for Barcelona and without them Arsenal had to settle for second again, also losing the FA Cup Final to Liverpool.
Sol Campbell arrived on a free transfer from rivals Tottenham, and Wenger unearthed the little known Kolo Toure as Arsenal reclaimed the title and did the double again, memorably beating United at Old Trafford to win the league before seeing off Chelsea in the FA Cup Final.
With Tony Adams retired to be replaced by Pascal Cygan, Vieira was elevated to captain and Gilberto Silva arrived to strengthen the midfield. However, Arsenal could not defend their league crown as they finished second, consoling themselves with an FA Cup Final victory over Southampton.
The 'Invincibles' season will forever stand out on Wenger's resume. Goalkeeper Jens Lehmann was the only significant arrival in a quiet summer (discounting a little known youngster called Cesc Fabregas, initially bound for the academy) as Arsenal's funds were taken up by the new stadium. But it worked a treat as Arsenal became the first team since Preston North End more than a century before to complete a campaign unbeaten. Wenger had splashed the cash in the winter, signing Jose Antonio Reyes, and at the end of the season he agreed a deal to sign Robin van Persie for £3m.
Arsenal's unbeaten run ended at 49 in the infamous 'Battle of the Buffet' at Old Trafford, and it signalled another momentum swing as United regained the title. However, they did beat Ferguson's side on penalties in the FA Cup Final - still the last major trophy Wenger has won with the club.
Vieira's departure to Juventus preceded a rapid fall in Arsenal's league fortunes as they only managed fourth place, their worst finish under Wenger. However, there seemed no reason to panic as they reached the final of the Champions League, where they were edged out 2-1 by Barcelona after the controversial dismissal of Lehmann.
A major end-of-season clearout saw the likes of Pires, Cygan, Campbell, Reyes, and Ashley Cole transferred out while Dennis Bergkamp retired, and without them Arsenal - celebrating a first season in their new home - again laboured to fourth, with little comfort to fall back on in the cup competitions.
The clear-out continued a summer later with Henry leaving for Barcelona, while Freddie Ljungberg and Reyes also departed. Arsenal topped the table for much of the season regardless, but faded to finish third, while losing to rivals Tottenham in the League Cup semi-finals.
Wenger signed Samir Nasri and Mickael Silvestre in a bid to get back in the title frame, but they could do no better than fourth, while losing in both the FA Cup and Champions League semi-finals.
Although Fabregas had now emerged as a truly outstanding player, scoring 19 goals from midfield, Arsenal were still off the pace in the league, finishing third, while they lost to Barcelona in the quarter-finals of the Champions League.
Wenger spent big on Laurent Koscielny and Sebastian Squillaci to try and fix Arsenal's defence, but it was a now familiar story in the league as they came in fourth. They had faded badly at the end of the season, something many attributed to their stunning League Cup final loss to Birmingham City, who scored an 89th-minute winner.
Big money deals for Gervinho, Alex Oxlade-Chamberlain and Mikel Arteta did little to placate fans after the departure of Fabregas, and their fears were borne out by a stunning 8-2 defeat to Manchester United. The season ended with another third-place finish and cup campaigns that fizzled out early.
Another tough summer saw Van Persie join United and Alex Song move to Barcelona. Wenger's new-look side found themselves in a tough battle with rivals Tottenham for the final Champions League place. Fourth spot - secured only on the final day of the season - was deemed a success, but unrest grew over the following summer until the club-record £42.5million signing of Mesut Ozil signalled new ambitions heading into 2014.