Then, when I came back, I would be able to show this ancient civilization to the world in all its glory and splendor.

splendor 是名词，意思是"辉煌、壮丽"，常用来形容宏伟壮观的事物或景象。这个词源自拉丁语，带有"光彩夺目、灿烂辉煌"的意味，特别适合用来描述古代文明的宏伟成就。