Yes, LEGO! Japanese YouTuber Talapz wasn't content with merely recreating Himeji Castle's main keep, so he decided to make a pop-up version of it. The whole thing weighs 12.5kg and took 15 months to finish. According to Talapz, no glue was used in constructing the project.
This isn't a first for him. As Kotaku previously reported, he did a pop-up LEGO version of the Kyoto Buddhist temple Kinkaku-ji.