Standard

Standard was one of the skins originally bundled with MediaWiki by default. The skin was based on the SkinLegacy class and resembled the look of the Phase II software.

History
Before the introduction of MonoBook in 2004, "Classic" was the default skin for Wikimedia Foundation wikis. It was removed in MediaWiki 1.22 and is not compatible with MediaWiki 1.25 and higher.