"This is the final one of many builds that I made while playing a modded 1.3 world on-and-off, with mods such as Calamity, Thorium, and Shadows of Abaddon among others.

Any aspiring collector does well with a space to display what they've found. Indeed, this is one of the reasons that I spent so much time building in this world; one of my goals was to collect all 9,819 unique items in the world by the time that this was made (11 April 2021), spanning many mods (Calamity, Thorium, Shadows of Abaddon, Necromancy, Fargo's mods, and tModLoader items, most prominently). This sky castle holds all of the more "collectible" types, namely banners, trophies, paintings, music boxes, statues, and the occasional other rare items.

Combined with this being my final build in the world, I took care to make the entire build as elaborately detailed and interesting as possible at my level of experience. As a result, the castle consists of a variety of materials. The most prominent ones are gray brick, marble, sunplate, cloud, white stucco, thorium bricks (Thorium), and checkered blocks (Thorium). The sunplate and thorium furniture sets are used throughout the build.

Fun facts:
-The collection does include unobtainable items. Everything else is collected through normal methods, while these unobtainable ones were only 'acquired' at the appropriate points of progression in exchange for an arbitrary amount of my resources. Examples include the frost painting from the scrapped Permafrost biome (Shadows of Abaddon), the Follower of Abaddon banner (SoA), and white cultist banners among other things.
-I would have included a collection of interesting items on item frames as well, although item frames didn't work with modded items. It would likely have been placed on the eastern ramparts.
-The dome is loosely inspired by governmental buildings in some places. It functions as an assembly chamber for the sky-dwelling inhabitants.
-The semblance of a courtyard in the middle has an open ceiling! Don't worry; the ramparts are fenced properly.
-I originally attempted to start this build during mid-hardmode, although for some reason decided against finishing it at the time. I believe that I wanted to wait to fill out my collection before building appropriately sized space for it. Here's the screenshot that I took right before the remodel: https://cdn.discordapp.com/attachments/796612908024987648/962086170886566018/Gallery_Castle_-_before.png
-The title is made after a setting in my novel work known as Genesia. I'll spare the details for if and when I get to that part. ^.^'

Detail screenshots can be found here:
Full castle with surroundings: https://cdn.discordapp.com/attachments/796612908024987648/962086079576547348/Gallery_Castle.png
Lobby: https://cdn.discordapp.com/attachments/796612908024987648/962086171717042176/Gallery_Castle_2a_-_lobby.png
Left side, with a small hermit's house: https://cdn.discordapp.com/attachments/796612908024987648/962086172010631188/Gallery_Castle_1_-_hermits_house.png
Right side, a simple cloudscape: https://cdn.discordapp.com/attachments/796612908024987648/962086172279050320/Gallery_Castle_3_-_clouds.png

This concludes my series of 1.3 tModLoader builds. Thank you for viewing these!"