Mussenden Temple is a small circular building located on cliffs near Castlerock in County Londonderry, high above the Atlantic Ocean. Perched on the cliffs overlooking Downhill Strand, it was once possible to drive a carriage around the temple: however, coastal erosion has brought the edge closer to the building. The temple was built in 1785 and forms part of the Downhill Demesne. The demesne was formerly part of the estate of Frederick, 4th Earl of Bristol, who served as the Church of Ireland Lord Bishop of Derry from 1768 until 1803. It was Lord Bristol – popularly known as 'the Earl-Bishop' – who had the 'temple' built. Constructed as a library and modelled from the Temple of Vesta in the Forum Romanum in Rome, it is dedicated to the memory of Bishop Lord Bristol's cousin Frideswide Mussenden.
Now part of The National Trust property of Mussenden Temple and Downhill Demesne, the grounds encompassing Mussenden Temple, and its manor house (Downhill Castle) are open to the public all year, from dawn to dusk.
References:The Temple of Edfu is one of the best preserved ancient shrines in Egypt. It was built in the Ptolemaic Kingdom between 237 and 57 BC.
Edfu was one of several temples built during the Ptolemaic Kingdom, including the Dendera Temple complex, Esna, the Temple of Kom Ombo, and Philae. Its size reflects the relative prosperity of the time. The present temple initially consisted of a pillared hall, two transverse halls, and a barque sanctuary surrounded by chapels. The building was started during the reign of Ptolemy III Euergetes and completed in 57 BC under Ptolemy XII Auletes. It was built on the site of an earlier, smaller temple also dedicated to Horus, although the previous structure was oriented east–west rather than north–south as in the present site.