The Pinnacle of the Silenced Cathedral was featured in Soul Reaver, where it was seen briefly in the opening video. Presumably in Zephonim Territory, The Pinnacle was not visitied in Soul Reaver but was planned to feature in the conclusion to the Original Soul Reaver Storyline .
The Pinnacle of the Silenced Cathedral was positioned atop the Silenced Cathedral in Kain's empire and it contained the main sounding pipes of the Silenced Cathedral. With Zephon and his clan taking control of the Catherdal, the pipes were closed and the Pinnacle of the Cathedral blocked off from the lower levels of the Cathedral.
Though the Pinnacle of the Silenced Cathedral is not visited in Soul Reaver, it was planned to feature heavily in the conclusion to the Original Soul Reaver Storyline . Raziel would have reached the Pinnacle by gliding from Kain's Mountain Retreat and would have continued to use the Amplified Reaver to battle off a 'swarm' of desperate vampires and open the sounding pipes, killing all of Nosgoth's Vampires as reconstructed in this video.
Raziel's "Hymn of Death" speech, removed from Soul Reaver was to have been performed at the Pinnacle of the Silenced Cathedral; high quality images of the Pinnacle suggest that the final section may have been an FMV and non-playable. The final Chronoplast Vision shows part of the aftermath of opening of the sounding pipes, with Raziel looking down at Nosgoth (Soul Reaver 2 would re-interpret the balcony as part of Janos Audron's Aerie .)