Terraria

Terraria was the projected reconstruction of Babylon, an ancient city located in the left and right banks of the Euphrates river with steep embankments to contain the river's seasonal floods, in the alternate USRAC War timeline, part of Arnold Perlstein's vision for the future of the Grand Alliance after the planned victory in the USRAC War (which he stated in the How I Can Help Make the World Great ceremony as an expection). Many Grand Alliance architects produced many of the plans for the rebuilt city in their capacities as a group of overseers of the project, only a small portion of which was realized between October 2025 to January 2026 when construction took place.

Some of the projects were completed, such as the creation of a great East-West city axis, which included broadening many ancient roads, building a column in front of Esagila, and even rebuilding of the Hanging Gardens of Babylon, Babylon Fortress, the Ishtar Gate, Etemenanki and Esagila. Others, however, such as the creation of the Grand Hall of the Alliance, had to be shelved owing to the end of the USRAC War as a result of the Ponyville Conference, the Berlin Conference and the Inkwell Isle Conference. A great number of the old buildings in many of the planned construction areas were, however, demolished before the ceremony, and eventually these three conferences, the Sapporo Accords and the Treaty of Ortigas stopped the plans until the plans have been cancelled the end of USRAC War.

This was location of the Big Brother's palace, and was featured prominently in the chapter "The Great and Powerful Prophecy" as the fascist-ruled multiverse's capital city, and the headquarters of the fascist Grand Alliance. It is a glittering, modern metropolis built over the ancient city of Babylon in Iraq. The city had been in development for many years preceding the Great Aristocratic Revolution, and its rise was mostly - if not entirely - funded by global financier Jonathan Stonagal and many other Grand Alliance financiers, who by manipulation of Perlstein left his entire estate to the one-world leader to finance his government. It becomes the center of media, commerce, and government as well as the one-world faith known as Ultimate Faith.

Name
It was Chinese architect Zhou Yifeng who conceived of rebuilding the ancient city of Babylon to be the capital of the new world the How I Can Help Make the World Great organizers would be instrumental in creating, and who provided the new name for it, "Terraria."

The official plan for rebuilding Babylon, which Albert Speer was put in charge of, was called the "Comprehensive Construction Plan for the Grand Alliance Headquarters City."