This is a detailed black and white engraving depicting an alchemical diagram titled 'MITTEL: CONIVNCTION'. The central focus is a tiered, mountain-like structure rising from a landscape with several human figures. The structure is composed of several levels, each labeled with an alchemical process: 'CALITINATION', 'SVBLIMATION', 'SOLVTION', 'PVTREFACTION', 'DISTILLATION', 'COAGVLATION', and 'INCTVR'. At the very top, within a domed structure, is a vibrant depiction of a phoenix rising from flames. Around the central structure is a circular band filled with various symbols and figures. These appear to be astrological or mythological, including figures holding objects, animals, and abstract symbols. The four elements are represented at the corners of the circle: 'IGNIS' (fire), 'AERIS' (air), 'TERRA' (earth), and 'AQVA' (water). Below the structure, at the base, are several human figures in various poses, seemingly engaged in the alchemical process. The overall style is intricate and detailed, typical of alchemical illustrations from the Renaissance or early modern period. The image is rich in symbolism and likely represents a complex alchemical or philosophical concept.