Siarnaq's texturepack.zip is a release file of the Minecraft resource pack Siarnaq - Builder's Heaven [64], made for Minecraft 1.11.2. It was published on December 30, 2017 and is 21.7 MB in size. For the full description, screenshots and every other version, visit the Siarnaq - Builder's Heaven [64] resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.