[Yahoo! News}- From a mosque in Iran to the largest Tiffany glasswork in existence, AD rounds up the locales of the most beautiful mosaics.
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High above the makeup department on the first floor of Macy’s in Chicago sits the largest Tiffany mosaic in existence. Originally commissioned for the Marshall Field’s department store (acquired and renamed by Macy’s in 2006), Tiffany’s magnum opus is comprised of 1.6 million pieces of iridescent glass.

Guests of this Art Nouveau treasure, located on the banks of the Danube River, are greeted by a sprawling white-and-aqua-blue glass atrium in the hotel’s lobby. The glass ceiling, described by the hotel as “a true labor of love,” was designed to enclose what was originally a horse-and-carriage drop-off for the palace.

Hundreds of thousands of pieces of glass comprise the mosaic ceiling of the d’Angleterre’s Palm Court, making it the largest ceiling of its kind in Northern Europe. It was designed by Italian glass artist Albano Poli, whose other mosaic credits include a blown-glass rose window at the Santa Croce Basilica in Florence and mosaics in the Vatican Gardens.