This final thesis describes the conservation and restoration work of the polychromed figurative sculpture of the crucified Jesus Christ made of terracotta which dates back to the 19th century from the church of San Vivaldo (Montaione, Florence). During the work on sculpture, the conservation and restoration process was carried out. Conservation implied documentation and analysis while restoration implied reconstruction of missing parts. The conservation and restoration process has been conducted in different phases and each phase in this paper is explained in detail in textual and visual form. The concept of planned actions and documentation on works done on the subject, which includes cleaning, reconstruction of certain sculpture parts and gilding, and the creation of an artificial patina of the bronze Jesus aureole, are described. Any intervention and work on the subject were documented with photographs. It is also cited the historical context of the subject itself, in which attention is given to the locality from which comes the sculpt of the crucified Jesus Christ and the iconographic representation of the cross symbols through history and its meaning, which has changed from the time of primitive Christianity to the biblical significance of the mystery of the cross.