De Ligt played three seasons with the 36-time Serie A winners before moving on to Juventus from Ajax in July 2019 with a five-year deal.
At 117 games in Turin, the 22-year-old won one Serie A championship and one Coppa Italia.
De Ligt said, “I’m thrilled to join this fantastic team as a player.
“FC Bayern is one of the most successful clubs in Germany, Europe, and the globe,” according to Wikipedia.
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“I was persuaded from the first by the sporting management’s sincere admiration, as well as that of the coach and the board. Additionally, it is a club with lofty goals that is excellently managed.
I’m thrilled to be a part of the FC Bayern saga finally.
Lucas Hernandez, a defender, cost Bayern 80 million euros ($88 million; £68 million) in 2019.
De Ligt, desired by Chelsea, joined Bayern this summer as the second Dutch international after midfielder Ryan Gravenberch did so.
Additionally, Bayern has acquired right-back Noussair Mazraoui from Ajax and striker Robert Lewandowski from Liverpool in deals totalling 50 million euros (£42.6 million).
