Sveta Nedelja is a municipality of twenty villages in Croatia. The three largest villages are municipal seat Nedešćina, Štrmac and Šumber. S…Sveta Nedelja is a municipality of twenty villages in Croatia. The three largest villages are municipal seat Nedešćina, Štrmac and Šumber. Sveta Nedelja is located on a high plateau above the Raša river valley and in the hinterland of the town of Labin.