Cornucopia.

Cornucopia (Αμαλθείας κέρας) (cornu copiae), or horn of plenty was a symbol of Plutus (Πλοῦτος) (Ploûtos), god of wealth in Greek mythology.

It was a symbol of abundance and wealth. According to legend, the cornucopia was the horn of the goat Amalthea (Ἀμάλθεια) or Achelous (Ἀχελώϊος) (Ἀχελῷος) (Akhelôios), who turned into a bull.

Many gods and goddesses were represented with a cornucopia.

Also, this symbol represented on some coats of arms.