Columbia subject headings:
Cities and towns--Belgium--History--Congresses.
Croy, Charles, duc de, 1560-1612.
Harvard subject headings:
Belgium--Description and travel--Early works to 1800.
Cities and towns--Belgium--Early works to 1800.
Cities and towns--Belgium--History--Congresses.
Croy, Charles, duc de, 1560-1612.
Princeton subject headings:
Cities and towns--Belgium--Congresses.
Cities and towns--France--Congresses.
Croy, Charles, duc de, 1560-1612--Congresses.