The usual logo/website title/copyright and company information - Not really essential to accessibility at the moment, but logo could have a link back to the homepage etc. And company information can be important.

The horizontal menu has no hyperlinks so far but in a bigger website with sub-sections this can be used and increase accessibility.

Breadcrumbs indicate the page currently on and also the previous pages, which act as hyperlinks back to the stated webpage.

Finally the vertical menu which is the main hub for navigation to other pages - all of which are very interesting.