Polyurethane fabrics can be manufactured in different thicknesses, depending on their intended use. For example, fabric used in diapers may be thinner than fabrics used for camping gear. Polyurethane fabrics are manufactured to feature a variety of characteristics. In situations where fuel contact is likely, the fabric can be made fire-retardant.
Oldest Wooden Building in the World. World's Oldest Wooden Building, is a five-story pagoda, part of HÅryÅ«-ji (Meaning: Temple of the Flourishing Law) Buddhist temple complex in Ikaruga, Nara Prefecture, Japan. The temple complex was completed in 607 AD.
The Most Important Building in the World. This is what the people of Florence might have called the Duomo Cathedral in the 1400s. To them, it probably was the most important building in the world. Instead of competing with other major cities through football games, Italian cities tried to outdo each other's buildings. Whoever had the best buildings, won.