This is the 7476th most frequent Russian word.
дворца
"Дворца" means "of the palace" in English.
Here, 'дворца' is in the genitive case, showing possession or connection to 'фасад'.
Фасад дворца был украшен красивыми скульптурами.
The palace facade was decorated with beautiful sculptures.
In this instance, 'дворца' is in the genitive case, used to specify 'история' (the history of) the palace.
Экскурсовод рассказал нам историю этого старинного дворца.
The guide told us the history of this ancient palace.
Here, 'дворца' is in genitive case denoting locality or relation to 'мир' (around the palace).