This is the 756th most frequent Polish word.
instytutu
"Instytutu" is the genitive or accusative singular form of the Polish word "instytut," which means "institute."
The word "instytutu" is used in its genitive case to denote possession, indicating "of the institute." This reflects the relationship to the building.
Odwiedziłem budynek instytutu w zeszłą sobotę.
I visited the building of the institute last Saturday.
Here, "instytucie" is used in the locative case to specify the location where the classes will occur.
Zajęcia w instytucie rozpoczną się w poniedziałek.
Classes in the institute will start on Monday.
"Instytutu" is used in the genitive case here to specify that the brochure belongs or relates to the institute.