Fiorentina fans came to the funeral at the Basilica of Santa Croce wearing purple scarves and holding flags of the club as the coffin of the late Italian international defender arrived.
Earlier this week, Fiorentina and Cagliari announced the retirement of Astori's No. 13 jersey in memory of the late player.
Astori joined the Milan youth academy and played for Cagliari and Roma before moving on loan to Fiorentina, later signing a long-term contract in 2016.
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