Her

“The light spread upwards from the glass roof making the theatre a festive ark, anchored among the hulks of houses, her frail cables of lanterns looping her to her moorings.”

–  James Joyce, A Portrait of the Artist as a Young Man (Pg.  78)

The theater, in this context, is regarded to as a woman, with pronouns such as “her” used to describe it. This is interesting as this occurs after Stephen comes face with a beautiful woman, and perhaps the narration shows how he is thinking of her even while describing architecture.