Centering an element is normally done with the style="display:block;margin:0 auto" or in bootstrap 3 by simply using the **center-block** class, but somehow this cant be done if you want to center elements containing media class,
ie : 

```
<div class="media">
    <div class="center-block">
        <div class="media-left"><img class="media-object" src="..."></div>
        <div class="media-body">
            <h4 class="media-heading">Header</h4>
            <h5>Info</h5>
        </div>
    </div>
</div>

```

if I use the **text-center** class instead, only the media-body gets centered and the media-left element stays solidly in the same place