From SO media grid and caption
by panchroma
HTML
<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<ul class="thumbnails">
<li class="span2">
<div class="caption">
<h5>Caption above</h5>
</div>
<a class="thumbnail" href="#">
<img alt="" src="http://placehold.it/160x120">
</a>
</li>
<li class="span2">
<a class="thumbnail" href="#">
<img alt="" src="http://placehold.it/160x120">
</a>
<div class="caption">
<h5>Caption below</h5>
</div>
</li>
<li class="span2">
<a class="thumbnail" href="#">
<img alt="" src="http://placehold.it/160x120">
</a>
<div class="caption">
<h5>Caption below</h5>
</div>
</li>
<li class="span2">
<div class="caption">
<h5>Caption above</h5>
</div>
<a class="thumbnail" href="#">
<img alt="" src="http://placehold.it/160x120">
</a>
</li>
</ul>
<hr>
<ul class="thumbnails">
<li class="span4">
<div class="caption">
<h5>Caption above</h5>
</div>
<a class="thumbnail" href="#">
<img alt="" src="http://placehold.it/160x120">
</a>
</li>
<li class="span4">
<a class="thumbnail" href="#">
<img alt="" src="http://placehold.it/160x120">
</a>
<div class="caption">
<h5>Caption below</h5>
</div>
</li>
</ul>
CSS
.caption {
text-align:center;
}
/* for testing purposes */
img {
width:100%;
height:auto;
}