 During the council scene in Rivendell when the fate of the Ring is  being decided, when Boromir makes his plea for the Ring to be  brought to Gondor, the "Gondor theme" can faintly be heard; in  "Return of the King", when the characters finally reach Gondor, this  theme is heard as a full orchestral piece. Composer  Howard Shore (qv) didnt plan out that this Rivendell background  music would develop into the "Gondor main theme" by the third film,  but it ultimately did evolve into it.