To illustrate multi-fidelity BO with Atlas, we use a dataset of simulated band gaps for 192 hybrid organicinorganic perovskite (HOIP) materials reported by Kim et al. HOIP candidates are designed from a set of 4 halide anions, 3 group-IV cations and 16 organic anions. Electronic and geometric descriptors of the HOIP components are available through Olympus. Two density functional theory (DFT) information sources are available for all 192 HOIP candidates.