Xerta Main Festival Activity · Xerta, Baix Ebre, Tarragona Image of Xerta, not of the place itself. Xerta's patron is Sant Martí de Tours, to whom a chapel of the parish church is dedicated with an altar depicting him on horseback; the village, situated at the historic Ebro weir, holds its festa major d'hivern on this patron's feast day. Photo: Josep Salvany i Blanch (Public domain) What to see and do in Xerta