[9] Although, like Preoteasa, he was originally close to Lucrețiu Pătrășcanu (who was himself an intellectual isolated among PCR members), Constantinescu associated with Gheorghiu-Dej/Emil Bodnăraș faction while in detention, endorsing successful moves against rival leader Ștefan Foriș.

[13] Kept alongside other prominent activists in the Caransebeș Prison, where he is believed to have been included in Gheorghiu-Dej's projected Soviet-backed government,[14] he became the focus of attention from penal authorities after being caught while composing messages addressed to the outside (upon discovery, he attempted to swallow all the rolling papers he had written on).

[15] An editor in chief of the PCR's Scînteia after the start of Soviet occupation,[16] Constantinescu led the panel of journalists towards Stalinist guidelines,[17] and encouraged a personality cult around Gheorghiu-Dej, whose biography he helped falsify.

[18] In February 1945, during street clashes between pro-Communist forces and authorities (leading to the fall of the Nicolae Rădescu cabinet), Scînteia published a claim that its editor had been the target of an assassination attempt.

[19] Through his editorials of 1947, Constantinescu signaled an attack on Foreign Minister Gheorghe Tătărescu, leader of the National Liberal Party-Tătărescu and associate of the Communists in the Petru Groza government, who had criticized his allies' economic and social policies.

[29] In 1956, together with the pro-Soviet Iosif Chișinevschi, Constantinescu observed the increasingly hostile relations between Nikita Khrushchev and Gheorghiu-Dej, and ultimately decided to attack the latter in public (identifying him with Stalinism and citing the history of Securitate political violence).

[32] Accused of "attempt to direct the party towards liberal anarchy and revisionism",[33] he was nonetheless convoked to express criticism of the writers Alexandru Jar, Mihail Davidoglu and Ion Vitner, all of whom had displayed similar support for reform.

[38] During the 1957 Plenum, as well as in 1961, Nicolae Ceaușescu was fully endorsing Gheorghiu-Dej's theories on the subject, and, initially indicating that, unlike the two opponents, he held Joseph Stalin in esteem, alleged that Constantinescu had little understanding of Marxist principles[39] (although his was, in all likelihood, much less significant).

[42] He was elected vice-president of the State Council in November 1972, a position he will hold concurrently with the office of president of the Great National Assembly, succeeding Ştefan Voitec from 28 March until his death on 18 July.

[43] Under the name Constant Mironescu, Constantinescu appears in the semi-autobiographical novel Luntrea lui Caron ("Charon's Boat"), written by Lucian Blaga years after he was reinstated by Gheorghiu-Dej (the book was only published posthumously).

[51] Miron Constantinescu's stay in Caransebeș prison and the subsequent investigation became a theme of official PCR propaganda;[15] the 1981 film Convoiul ("The Convoy"), directed by Mircea Mureșan and starring Ion Besoiu, Emil Hossu, and Costel Constantin, was a romanticized depiction of the events.