context: On October 25, 1950, during reconnaissance, an Armenian scientist K. L. Hovhannisyan discovered two basalt stones covered with cuneiform writing. One of these stones reported the construction of a granary by the Urartian king Sarduri II, and the second attributed the construction of the Erebuni fortress to King Argishti I. After this find, the hypothesis appeared that Arin-Berd hill hides the ruins of ancient Erebuni, and archaeological excavations continued on the hill since 1952. jointly conducted by two archaeological expeditions: the Institute of Archeology and Ethnography of the Academy of Sciences of the Armenian SSR and the State Museum of Fine Arts named after Pushkin under the general scientific supervision of B. B. Piotrovsky. Due to the fact that many objects with the inscription “Erebuni” were discovered during excavations of the neighboring Teishebaini, there were some doubts for a while whether Erebuni was actually located on Arin-Berd Hill: there was a possibility that the plate discovered by Oganesyan in 1950 got on a hill by chance. After 8 years, in 1958, doubts were finally resolved, and the hypothesis was finally confirmed: during archaeological excavations, another inscription by Argishti I about the foundation of Erebuni was discovered intact, on a stone laid in an ancient wall. Thus, since 1958, Erebuni was finally localized on Arin-Bird Hill [4] [5].
question: Who discovered the ruins of Erebuni?
answers.text: K. L. Hovhannisyan