This is the 2755th most frequent Polish word.
europejskim
The Polish word "europejskim" means "European" (adjective, instrumental singular form).
'europejskim' in this sentence functions as an adjective describing 'malarstwem' (painting), indicating its European origin.
Jestem zainteresowany europejskim malarstwem.
I am interested in European painting.
'europejskim' here is an adjective that describes 'rynku' (market), signifying its association with Europe.
Nasza firma uczestniczy w europejskim rynku.
Our company participates in the European market.
'europejskim' in this instance modifies 'studium' (studies) to denote their focus on Europe.