Baptistery within Saint-Sauveur Cathedral, Aix-en-Provence, France. The baptistery was built at the beginning of the 6th century, at about the same time as similar baptisteries in Fréjus Cathedral and Riez Cathedral in Provence, in Albenga in Liguria, and in Djémila, Algeria. Only the octagonal baptismal pool and the lower part of the walls remain from that period. The other walls and the dome were rebuilt in the Renaissance. A viewing hole in the floor reveals the bases of the porticoes of the Roman forum under the baptistery (source-Wikipedia).

Some tech details about this photograph:

Tripods are not allowed in this sacred place so all exposures were taken handheld hence the not so crisp result. Camera Canon EOS 550D + Tokina 12-24mm. ISO speed ratings 200 Nine handheld bracketed exposures -2/0/+2 Six additional exposures -4/+4 generated in Canon DPP. Total 15 exposures CA and noise reduction in Photoshop CS3 HDR + Tonemapping in Photomatix Adjustments in levels, curves, sharpness and colours in Photoshop CS3. Farbspiel method (Thanks Klaus).

I hope some other time I am allowed to use my tripod in this fantastic location.

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