The exterior of the Grand Mosque of Cordoba has a real patina of age to it (only slightly enhanced with the use of the Topaz Adjust PS Plug-in).
From Wikipedia : 'It was the most magnificent of the more than 1,000 mosques in the city and was at one time the second largest mosque in the Muslim world. It was connected to the Caliph's palace by a raised walk-way, mosques within the palaces being the tradition for the islamic rulers of all times.
The city in which it was built was subject to frequent invasion and
each conquering wave added their own mark to the architecture. The
building is most notable for its giant arches, with over 1,000 columns
of jasper, onyx, marble, and granite. These were made from pieces of
the Roman temple which had occupied the site previously, as well as
other destroyed Roman buildings. The double arches, pictured above,
were a new introduction to architecture, and helped support the
tremendous weight of the higher ceilings. The double arches consist of
a lower horseshoe arch and an upper semi-circular arch. The Mezquita
also features richly gilded prayer niches. A centrally located
honey-combed dome has beautiful blue tiles decorated with stars. The
mihrab is a masterpiece of architectural art, with geometric and
flowing designs of plants. The Mezquita reached its current dimensions
in 987 A.D. with the completion of the outer naves and orange tree
Patio de los Naranjos, inside the Mezquita.
In 1236, Cordoba was recaptured from the Muslim army by King Ferdinand III of Castile and the mosque was reconsecrated a Christian church. Alfonso X oversaw the construction of the Villaviciosa Chapel and the Royal Chapel within the structure of the mosque. The kings who followed added further Christian features: Enrique II rebuilt the chapel in the 14th century.
The most significant alteration was the construction of a Renaissance cathedral nave in the middle of the structure. It was constructed by permission of Carlos V, king of united Spain. Its reversion to a Christian church (officially the Cathedral of the Assumption of the Virgin) may have helped to preserve it when the Spanish Inquisition was most active.'