The Refuge of Helm's Deep is the beautiful piece Howard Shore created for that part in The Two Towers (movie) when the aftermath of the battle with Saruman's wargriders is observed. It is an amazing piece, as is all of the music from The Lord of the Rings film trilogy. ;)
"ℌ𝔦𝔰 𝔏𝔬𝔳𝔢 𝔑𝔢𝔳𝔢𝔯 𝔉𝔞𝔦𝔩𝔰!" (𝙻𝚎𝚊𝚟𝚎 𝙼𝚎 𝙰 𝙽𝚘𝚝𝚎) 21:13, June 30, 2018 (UTC)