Short answers, pulled from the story.
The country officially became the People's Republic of Romania on the 30th of December 1947. King Michael I was forced to abdicate at his palace in Sinaia by December 1947, ending Romania's status as the only monarchy remaining in the Eastern Bloc.
Gheorghe Gheorghiu-Dej emerged from prison during World War II to lead the Romanian Workers' Party after Stalin's death in 1953. He resisted Khrushchev's de-Stalinization efforts while simultaneously asserting greater independence from Moscow until his successor took power in 1965.
One of history's most infamous brainwashing experiments occurred between 1949 and 1952 at the political prison of Pitești involving psychological and physical torture designed to reeducate opponents through humiliating acts. Tens of people died during these procedures, though the primary goal was transformation rather than execution.
In October 1966, Decree 770 outlawed abortion and contraception to increase population numbers from 23 to 30 million inhabitants. This policy resulted in over 9,000 women dying from illegal abortions and large numbers of children placed in orphanages.
An analysis by the Union of Architects commissioned in 1990 claimed over 2000 buildings were torn down, including more than 77 of very high architectural importance. Beginning in 1974, this program involved demolishing existing hamlets, villages, towns, and cities to construct high-density blocks of flats known as blocuri.
On the 25th of December 1989, Ceaușescu and his wife Elena were executed by firing squad after being convicted by a drumhead court-martial. Fighting between protesters and security forces resulted in more than 1100 deaths over subsequent days following their execution.