While the bishopric has been established since at least the 4th century, the present Acqui Cathedral building was begun under bishop Primo (989-1018) and was consecrated in 1067 by bishop Guido. The ground plan is in the shape of a Latin cross, and there are five aisles (but until the 18th century, only three), terminating in three semi-circular apses. Of the Romanesque structure there still remain visible the apses, the transept, and the crypt, which underlies both the transept and the choir. The remainder has been subject to further work in later centuries.
The terracotta bell tower was finished in 1479, and the bells moved from the old campanile. The main entrance in marble, by Giovanni Antonio Pilacorte, dates from 1481, and the rose window above it from around the same date, while the portico is 17th century. The interior was re-fitted in Baroque woodwork, and was decorated with frescos and stucco work from the 17th to the 19th centuries.
Next door are the canons' cloisters of the late 15th century, and some Roman ruins.
The 19th century pulpit and the Baroque altar of Saint Guido in the transept are worthy of note. The most important work of art in the cathedral by far however is the triptych of the Madonna di Montserrat, the Annunciation to the Virgin of Montserrat, the work of the 15th century Spanish painter Bartolomé Bermejo, in the chapter house.
References:The Broch of Clickimin is a large and well preserved, though somewhat restored broch near Lerwick. Originally built on an island in Clickimin Loch (now increased in size by silting and drainage), it was approached by a stone causeway. The water-level in the loch was reduced in 1874, leaving the broch high and dry. The broch is situated within a walled enclosure and, unusually for brochs, features a large 'blockhouse' between the opening in the enclosure and the broch itself. Another unusual feature is a stone slab featuring sculptured footprints, located in the causeway which approached the site. Situated across the loch is the Clickimin Leisure Centre.