Gustav Heinrich Johann Apollon Tammann (9 June [O.S.

28 May] 1861 – 17 December 1938)[1] was a prominent Baltic German chemist-physicist who made important contributions in the fields of glassy and solid solutions, heterogeneous equilibria, crystallization, and metallurgy.

[2] Tammann was born in Yamburg (now Kingisepp, Leningrad Oblast).

[3] He went to Göttingen University in 1903 where he established the first Institute of Inorganic Chemistry in Germany.

On 28 May 1936, Tammann was awarded the Eagle Shield of the German Empire (Adlerschild des Deutschen Reiches),[4] with dedication "The Doyen of German Metallurgy".