It includes the entire Old Town, which is also a UNESCO World Heritage Site, and many sites within and around it. Some of the most notable in the Old Town include the Cathedral which was started in 1421 and is the tallest cathedral in Switzerland, the Zytglogge and Kafigturm towers, which mark two successive expansions of the Old Town, and the Holy Ghost Church, which is one of the largest Swiss Reformed churches in Switzerland. Within the Old Town, there are eleven 16th century fountains, most attributed to Hans Gieng, that are on the list.
Who is attributed to the 11 fountains in Old Town?
Hans Gieng

The great majority of asphalt used commercially is obtained from petroleum. Nonetheless, large amounts of asphalt occur in concentrated form in nature. Naturally occurring deposits of asphalt/bitumen are formed from the remains of ancient, microscopic algae (diatoms) and other once-living things. These remains were deposited in the mud on the bottom of the ocean or lake where the organisms lived. Under the heat (above 50 C) and pressure of burial deep in the earth, the remains were transformed into materials such as asphalt/bitumen, kerogen, or petroleum.
Besides heat, what other requirement is needed to form asphalt?
pressure

An intellectual revitalization of Europe started with the birth of medieval universities in the 12th century. The contact with the Islamic world in Spain and Sicily, and during the Reconquista and the Crusades, allowed Europeans access to scientific Greek and Arabic texts, including the works of Aristotle, Ptolemy, Jabir ibn Hayyan, al-Khwarizmi, Alhazen, Avicenna, and Averroes. European scholars had access to the translation programs of Raymond of Toledo, who sponsored the 12th century Toledo School of Translators from Arabic to Latin. Later translators like Michael Scotus would learn Arabic in order to study these texts directly. The European universities aided materially in the translation and propagation of these texts and started a new infrastructure which was needed for scientific communities. In fact, European university put many works about the natural world and the study of nature at the center of its curriculum, with the result that the "medieval university laid far greater emphasis on science than does its modern counterpart and descendent."
Who sponsored the Toledo School of Translators?
Raymond of Toledo