Often overlooked by visitors, this is the spectacular entrance hall of the National Museum of Ireland in Dublin. Designed by T.N. and T.M. Deane in 1885-90 and taking the form of a rotunda, it consists of a ground floor around which run a series of polished Ionic columns in different coloured Irish stone. The deep entablature, pierced by a sequence of oculi, supports a balustraded gallery above which pilasters with gilded capitals framing niches and, in one section, windows. And on top of this floats the dome. Meanwhile, the floor is covered in mosaic designed and laid by the Manchester firm of Ludwig Oppenheimer Ltd; the central section is taken up by the twelve signs of the Zodiac surrounding a stylised sun.

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