The MUSKLA database contains the photographs of four auditoriums taken during 2021 and 2024. The data was captured and curated in the "Person-focused Acoustics of Architectural Design" research group, a Junior Principal Investigator fellowship in RWTH Aachen University, at the Institute for Hearing Technology and Acoustics (IHTA). Two types of photographs were taken in each hall: narrow-angle and spherical photographs. The dataset contains separate folders for each hall and for each photograph type. In the report at v1, the features of the photographs are described. Please note: V1 contains the spherical photographs and report in PDF format. V2 contains the narrow-angle photographs and cover images.