Brittle cellular solids combine low weight with a large surface area and have thus found use in energy storage devices, filtration, acoustic insulation, armored textiles as well as thermal shielding under extreme conditions (e.g. Parker Solar Probe). Our recent efforts integrate additive manufacturing, characterization, and physics-based modeling, to understand and predict the onset and propagation of damage in brittle cellular materials. Our goal is the synthesis of novel architected materials that combine superior fracture strength and toughness.