Left: composite VRI color image (1.7′ × 1.7′) of the five MUSE fields covering the cluster SH 2-266, the central star MWC 137, and its circumstellar nebula. Right: spatial distribution of the brightest cluster stars (blue diamond in the center: MWC 137; black squares: A- and B-type stars; red squares: F- and G-type stars; black open squares: unclassified stars; arrow: jet extension, see Sect. 3.4). The stars for which a spectral type was obtained are indicated with a number, which is consistent with Table 2.