Many girls, one guy - is this system patriarchal or matriarchal?

Many girls, one guy - is this system patriarchal or matriarchal?
Read carefully.
The Emperor is surrounded by women - wives, concubines and relatives, that are addressed as Empresses, Dowager empresses, Deputy Empresses - that on a theoritical level put him in the highest position and in thory, follow his wishes and demands.
However, in practice, the Emperor has little actual authority while the women - the Empresses - make all the practical decisions and use the Emperor as a rubber stamp for their decisions.
So what is it?
Patriarchal
Matriarchal
Other
Select gender and age to cast your vote:
Many girls, one guy - is this system patriarchal or matriarchal?
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