Here, we consider the players that can be named as Wenger's top five signings since arriving at Highbury on September 30 1996.
5: Aaron Ramsey
Wenger signed the Wales international as a raw 17-year-old from Cardiff for £5million in 2008. Although his progress has been interrupted by serious injuries, Ramsey has this season emerged as one of the most exciting midfielders in the Premier League.
4: Cesc Fabregas
In terms of a money-making signing, there are few to equal Fabregas. He cost Arsenal just £500,000 in compensation to Barcelona in 2003, and the Catalan club bought him back in 2011 for 70 times that sum, £35million, after eight years in which he became much-loved by Gunners fans.
3: Sol Campbell
Arrived on a free transfer from Tottenham and filled the gap in Arsenal's defence left by Tony Adams' retirement. Campbell's arrival coincided with the most trophy-laden years of the Wenger era.
2: Thierry Henry
Wenger had the foresight to see that Henry, who was being played as winger by Juventus, could develop into a out-and-out striker. The Frenchman soon repaid his £11million fee, becoming the outstanding striker in Europe and Arsenal's record goalscorer.
1: Patrick Vieira
The man who began it all. He was Wenger's first target when joining Arsenal and moved from AC Milan for £3.5million in 1996. Combative midfielder Vieira became the Gunners' inspirational captain during eight years at the club, winning seven club trophies plus the World Cup and European Championships with France.