@Arius87 is correct. But in saying that the Witcher 1 did contain armor sets worn by npc's that resemble Templar armour's. In particular npc's that wore 13th century flat topped Heaume's. whilst its slightly possible but not likely that the amour set will be in the game on npc's, it is even less likely that there will be a set for Geralt to wear that resembles Templar armour.