HTML Plugin
[{Html
<b>bold</b> normal <em>italic</em>
}]
displays bold normal italic.
[{Html id='2124'}]
displays the content of the html document having the identifier 2124.
Alternatively, you can use one of the following snippets, if your markup is not stored in the Document Manager, but is attached to a wiki page:
[{Html src='175'}]
[{Html src='markup.html'}]
[{Html src='Another page/markup.html'}]