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We present results on the formation of Pop III stars at redshift 7.6 from theRenaissance Simulations, a suite of extremely high-resolution and physics-richradiation transport hydrodynamics cosmological adaptive-mesh refinementsimulations of high redshift galaxy formation performed on the Blue Waterssupercomputer. In a survey volume of about 220 comoving Mpc$^3$, we found 14Pop III galaxies with recent star formation. The surprisingly late formation ofPop III stars is possible due to two factors: (i) the metal enrichment processis local and slow, leaving plenty of pristine gas to exist in the vast volume;and (ii) strong Lyman-Werner radiation from vigorous metal-enriched starformation in early galaxies suppresses Pop III formation in ("not so") smallprimordial halos with mass less than $\sim$ 3 $\times$ 10$^7$ M$_\odot$. Wequantify the properties of these Pop III galaxies and their Pop III starformation environments. We look for analogues to the recently discoveredluminous Ly $\alpha$ emitter CR7 (Sobral et al. 2015), which has beeninterpreted as a Pop III star cluster within or near a metal-enriched starforming galaxy. We find and discuss a system similar to this in some respects,however the Pop III star cluster is far less massive and luminous than CR7 isinferred to be.

Late Pop III Star Formation During the Epoch of Reionization: Results from the Renaissance Simulations