Londoner Armen Sahayan donated a valuable Armenian literature consisting of 400 units to the Matenadaran named after Mesrop Mashtots. Armen Sahakyan’s donation includes 11 ancient books, 40 albums and one atlas with his own addition, published in Oslo, 1923. Thirty-eight media units have been registered in foreign languages. Director of Matenadaran Vahan Ter-Ghevondyan handed Armen Sahakyan a letter of gratitude for his donation and cooperation with Matenadaran.