Opuscula is published by the Swedish Institutes at Athens and Rome, with the aid of a grant from the Swedish Research Council. Distributed by Eddy.se AB. View journal at ERIH PLUS. All content available with open access. Clay paste characterization and provenance determination of Middle and Late Helladic vessels from Midea By Katie Demakopoulou, Nicoletta Divari-Valakou, Joseph Maran, Hans Mommsen, Susanne Prillwitz & Gisela Walberg Abstract Results of the Neutron Activation Analysis (NAA) of 61 pottery samples of Middle and Late Helladic date from recent excavations in Midea are presented. Chronologically, the sampled pieces fall into two groups, the first of Middle Helladic and Late Helladic I/II, the second of LH III date, with most samples dating to LH IIIB or IIIC. The analyses suggest an Argive/North-eastern Peloponnesian provenance for the majority of the sampled pottery, since 26 of the samples are assigned to the NAA group Mycenae-Berbati (MYBE) and 15 to the NAA group Tiryns (TIR), including their subgroups. In addition to the two main groups the analyses include three other categories: “non-Argive”, unlocated, and singles. The differentiation into a small number of distinct chemical patterns is much more evident in the second chronological group of sampled pottery than…