This is a widget area. To change this area, go to Appearance > Widgets, find a cool widget, drag and drop into the area that says Sidebar One, and your widget will appear here.
Kundera is a theme based off an author I admire with the first name Milan, last name...Kundera. It seemed like as good a name as any. But it is also a theme that intended to be unique. It is a minimalist Tumblog built for WordPress. I have not seen one like it.