Selected ceramics from the Late Mycenean (Helladic) settlement of Kastrouli central Greece have been analysed by an electron probe microanalyzer (EPMA) equipped with four wavelength-dispersive spectrometers and one energy-dispersive spectrometer. The aim to unravel the “ceramo-genetic” processes was possible by integrating optical microscopy, and EPMA (with SEM capabilities) following a specific protocol narrowing down to μm scale. A detailed characterization of eight diagnostic sherds for their texture and major element chemistry is made, including collection X-ray maps for different elements showing the zonation of minerals in relation to the adjacent matrix. Also, the temperature range was estimated – where possible – based on the observed mineral assemblage, texture and chemistry. The most favorable firing temperature maxima for our samples are 900–1000°C.