Fine lion realised in detailed naturalistic manner, represented in an unusual position (maybe a part of a larger composition or a door knocker?). The curious position allows us to hypothesize that the element on which the hind legs rested is missing.
For a parallel see Vincenzo and Gian Gerolamo Grandiβs door knocker (16th century, Castello del Buonconsiglio, Trento) depicting a lion ridden by a cupid, in the same position.