I'd like to see a 1 degree clockwise rotation to straighten things up. Other than that, my main concern is the figure. I personally find the posture and the bag or case held a little distracting, and given the position in the frame the figure and what he/she is doing become my main interest. There's always a fine line between an environmental portrait and a landscape/architectureal photograph with a figure, and in this case the balance for me has tipped to the personal interest rather than the building.
You might consider a crop on the right hand side to remove the lighter inner stonework of the window, as the lighter area here diverts attention away from the centre. The only really lioght area I'd like to see toned down a little is that on the left hand side of the corridor.
I like the way the beam of light from the end spreads out across the ceiling.