He replaces Maurizio Sarri, who quit following last week’s 2-1 home defeat to relegation-threatened Udinese.
Sarri’s assistant Giovanni Martusciello temporarily took charge for their 3-2 win at Frosinone at the weekend, which leaves them in ninth place in Serie A.
Former Croatia and Juventus defender Tudor is a much-travelled coach whose former sides include Hajduk Split, Galatasaray, Udinese and Hellas Verona.
The 45-year-old’s last job was at Olympique de Marseille, who he led to a third-place finish in the French topflight last season.
ANSA