This is the 1160th most frequent Spanish word.
europeas
"Europeas" means "European" (feminine plural).
In this sentence, 'europeas' is an adjective modifying the noun 'ciudades,' indicating that the cities discussed are located within Europe.
Las ciudades europeas tienen una arquitectura impresionante.
European cities have impressive architecture.
Here, 'europeas' is an adjective describing the noun 'culturas,' signifying that these cultures originate from Europe.
Muchas culturas europeas han influido en la historia mundial.
Many European cultures have influenced world history.
'Europeas' again functions as an adjective, qualifying the noun 'tradiciones' to denote that the traditions studied are those related to Europe.