This is the 6768th most frequent Polish word.
etnograficznego
"Ethnographic" (relating to the study of cultures and peoples).
Here, 'etnograficznego' is used as an adjective modifying 'Muzeum', emphasizing the museum's ethnographic focus.
Muzeum Etnograficznego znajduje się w centrum miasta.
The Ethnographic Museum is located in the city center.
In this sentence, 'etnograficznego' describes the type of material collected, indicating its relation to the field of ethnography.
Część projektu dotyczy materiału etnograficznego zebranych od mieszkańców wsi.
Part of the project pertains to ethnographic material gathered from village inhabitants.
'Etnograficznego' here refers to the nature of the items, signaling their association with ethnographic aspects.