I had a crisis of confidence with my Blackfriars thumbnail picture and have looked around for another option. When I was young I went to Brazil and one town that made a big impression on me in terms of its architecture was a place called Ouro Preto, meaning Black Gold.

Here is the Igreja Nossa Senhora do Rosario, the church of Our Lady of the Rosary.

Also the actual instructions for the thumbnail are to just use a pen and one shade of grey so my last picture went a bit overboard.