I've found it!

[DyeffersonAz]

https://www.mariowiki.com/index.php?title=Main_Page&oldid=24

The first version of MarioWiki's main page by Porplemontage.

 

[LeftyGreenMario]

But where's the old MarioWiki logo???

 

[YoshiFlutterJump]

But where's the old MarioWiki logo???

It's called the "Wayback Machine".