A wide range of bronze and copper artefacts and samples of scrap and waste from the Unexplored Mansion at Knossos in Crete were analyzed non-destructively by x-ray fluorescence. The Unexplored Mansion was occupied principally during the second half of the fifteenth century B.C. and the bronzes belong to the end of the period when Minoan copper and bronze metallurgy was at its peak. It was at this time that Knossos was under Mycenaean control and influence. The analytical data showed that tin was the only alloying metal used in the preparation of the bronzes, but it was found that a significant proportion of the samples analyzed were composed of copper alone. Correlations were made between the tin content and the type and intended function of the artefact. The results were used in a few cases to alter or modify the identification of artefacts. -- AATA