As if tens of thousands killed, millions displaced, widespread famine, and a deadly cholera epidemic weren't enough, the misery of Yemen's civil war has also eroded the country's rich cultural heritage. A nation with three UNESCO World Heritage Sites and a further 10 sites on the organization's tentative list, Yemen is renowned for its historic mosques, palaces, and other unique buildings. But a worrying amount of this ancient architecture has been severely damaged since the outbreak of hostilities.
How concerned should the world be? Browse this gallery and take a look at what's at risk.