Jean Baptiste Holzmayer

He carried out excavations on locations of the ancient forts and stone graves, and gathered material about local religious customs and folklore.

[5] Holzmayer carried out limited excavations at the locations of ancient forts of Kaarma, Muhu, and Pöide.

During period of 1868–1874 Holzmayer excavated the stone graves of Piila, Kantsi, Päälda, Paju, Loona, Mäla, Kurevere and Viira.

By the time of Holzmayer's death, the museum's collection included 1163 archeological objects, and 1877 coins, mostly from the ancient hoards.

Due to his strict leadership, most of the Baltic-Germans left the society, leaving only common people as members.