How to Create a CSS Equal Height Columns (Create Div Columns with the Same Height)

<div class="drogon"><img src="drogon.png" /></div> <div class="house-lists"> <div class="house" style="background-image: url('stark.png');"> <div class="house-inner"> <div class="sigil"><img src="sigil/sigil-stark.png" /></div> <div class="house-name">Stark</div> </div> </div> <div class="house"...