Adalbert Atto (or Adalberto Azzo) (died 13 February 988) was the first Count of Canossa and founder of that noble house which eventually was to play a determinant role in the political settling of Regnum Italicum and the Investiture Controversy in the eleventh and twelfth centuries.

Countship

Adalbert first appears in sources as a son of Sigifred of Lucca.

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