Pictured here with his his wife, Anna-Liisa.
Wikipedia Finland has a brief entry
J'ai le penible devoir d'annoncer le deces du Prof. Heikki Koskenniemi, survenu le 26 septembre 2013, a la veille de son 94e anniversaire. Je reproduis ci-dessous un extrait du courriel que son fils a adresse vendredi au secretariat de l'AIP.
Papyrologists will learn with sadness of the death of Prof. Heikki Koskenniemi on 26th September 2013, on the eve of his 94th birthday. You will find below an abstract from the email his son sent on Friday to the AIP secretariat.
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My dear father, Professor Heikki Koskenniemi, died in Christ very early yesterday in Turku.
Heikki Koskenniemi received his training by Prof. Vittorio Bartoletti in Florence in early 1950's and he visited papyrological conferences as long as it was possible for him. With my son, Johannes Koskenniemi, we will publish my father's edition of P.Turku together, hopely in 2014.
The international network of papyrologists meant to my father more than I can tell. Please, tell everyone who still remember him, our deepest gratitude for the kindness you showed to Heikki Koskenniemi.