News that the transfer had gone through came via Arsenal's official Twitter account on Wednesday:
As noted by football writer Lars Pollmann, the Bundesliga side informed their shareholders of the fee received for the forward:
Dortmund director Michael Zorc had mixed things to say about Aubameyang following his departure, per Charles Watts of Football.London:
The acquisition of Aubameyang is a crucial one for the Gunners, who have spent big to replace Alexis Sanchez, who departed midseason for Manchester United.
It's a transfer that brings an end to four-and-a-half years at Dortmund for Aubameyang. During that time the striker has cemented his status as one of the most dangerous attackers in the world.
As these numbers from Squawka Football illustrate, the 28-year-old has been effective in front of goal for Dortmund:
While Aubameyang has an eye for goal, there are many different aspects to his game that will make Arsenal supporters excited about this deal.
The striker is quick, and if creative players around him can release Aubameyang into space, there's few defenders in the Premier League capable of catching him. Additionally, the new Arsenal man is a strong runner and competitive in aerial battles.
The striker's integration into the setup at the Emirates Stadium may well be aided by another January signing. As these numbers from WhoScored.com show, the striker linked up brilliantly with Henrikh Mkhitaryan during their time together at Dortmund:
It's going to be fascinating to see how Arsenal boss Arsene Wenger looks to use Aubameyang. In Alexandre Lacazette he has another natural centre-forward, though he's a manager who hasn't utilised a two-striker system recently.
Other concerns about the deal may come in the form of Aubameyang's attitude; he was suspended on three separate occasions by Dortmund over the course of the last two seasons due to his conduct off the field.
Even so, Arsenal have secured one of the game's best goalscorers in what appear to be the peak years of his career. If he can strike up an affinity with Lacazette, Mkhitaryan and Mesut Ozil, Aubameyang has the class to set the Premier League alight.