Considering your circumstances, this is a great night shot. I've always enjoyed the cathedral and the lighting in this shot compliments the architecture of the building. Maybe try rotating it a little counter-clockwise to compensate for the unevenness of your makeshift tripod.
excellent shot , you was so lucky u found that wall , i wondered i is teh tilt in the photo , now i knew after i read the about , i knew, still it's an excellent photo (7+) best regards
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