In Al Hanissim we say:
Vhidliku Neiros Bchatzros Kodshecha
Why in do we use the Plural form, was there more than one Chatzer?
The various gradations of holiness within the Beis Hamikdash complex (listed in the Mishnah, Kelim 1:8ff) are each generally referred to in Tanach as a chatzer. The expression חצרות קדשך is borrowed from Isaiah 62:9 (בחצרות קדשי), referring to Jerusalem as a whole. And then we find, among others:
The Lubavitcher Rebbe's (zt"l) answer that I quoted here says that indeed they lit lamps and candelabra throughout the entire complex (in all of these "courtyards") in order to show their gratitude to Hashem for the miracles of Chanukah.