Without a doubt. The club had never won the Bundesligabefore, and had only once lifted the German Cup. To win both in the same season without losing a game is undoubtedly the greatest achievement in the club's history, and likely one that will never be topped.
Had they not lost the Europa League final to Atalanta, the campaign would have been even more remarkable but for a side whose most famous achievement up until this year was losing the Bundesliga, the German Cup final and the Champions League final in 2002, this season is a proud and memorable moment.
It's hard to argue with an undefeated league and cup double, let alone one achieved by a head coach in his first full season in charge of a first team. No side had ever won the Bundesliga without losing before, so to do so by scoring a hatful of late goals and also win the German Cup certainly puts Leverkusennear the top of the conversation.
Jupp Heynckes' treble winning season with Bayern Munich in 2013, however, might just be ahead of Leverkusen based on the trophy haul. Heynckes' Bayern won the league by a whopping 25 points and........