So much for the traces of sun-worship in rites connected with fire. There are traces of it also in certain folk-customs, at one time common, and not yet extinct. Highlanders were formerly in the habit of taking off their bonnets to the rising sun. Akin to this is the feeling underlying the Venetian expedition to the Lido, annually repeated in July, when thousands cross to that island at dawn, and utter a loud shout when the sun rises above the horizon. In cases where sun-worship is a national cult we naturally expect it to have a marked influence on the sacred customs and architecture of its votaries. One example will suffice. In his "Pre-historic Man," Sir Daniel Wilson thus describes the great annual festival of the Peruvians, held at the summer solstice:--"For three days previous, a general fast prevailed; the fire on the great altar of the sun went out, and in all the dwellings of the land no hearth was kindled. As the dawn of the fourth day approached, the Inca, surrounded by his nobles, who came from all parts of the country to join in the solemn celebration, assembled in the great square of the capital to greet the rising sun. The temple of the national deity presented its eastern portal to the earliest rays, emblazoned with his golden image, thickly set with precious stones, and as the first beams of the morning were reflected back from this magnificent emblem of the god of day, songs of triumph mingled with the jubilant shout of his worshippers. Then, after various rites of adoration, preparations were made for rekindling the sacred fire. The rays of the sun, collected into a focus by a concave mirror of polished metal, were made to inflame a heap of dried cotton; and a llama was sacrificed as a burnt offering to the sun." Even after sun-worship has ceased to be a national cult, we find it continuing to regulate the position of buildings, devoted to a totally different worship. In this way what is commonly styled the "orientation" of Christian churches can be accounted for. Indeed, so much had the sun to do with churches, that when one was built in honour of a particular saint, it was made to face the point of the horizon, where the sun rose on the festival of the saint in question.