Columbia subject headings:
Harvard subject headings:
Collective memory--Europe, Eastern--Congresses.
Europe, Eastern--Anniversaries, etc.--Congresses.
Europe, Eastern--Centennial celebrations, etc.--Congresses.
Europe, Eastern--History--20th century--Congresses.
Europe, Eastern--History--21st century--Congresses.
Princeton subject headings:
Democracy--Europe, Eastern--Congresses.
Dictatorship--Europe, Eastern--Congresses.
Europe, Eastern--Politics and government--1989---Congresses.
Presidents--Europe, Eastern--Congresses.