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.
Hermann Castle, Narva, Estonia Image courtesy of lhoon, Flickr. One of the oldest fortresses in Europe, Hermann Castle, founded in 1256 by the Danes, is the first stone castle to be built at the beginning of the 14th century. Itâs one of the primary attractions of that region, located on the Estonian-Russian border along its far eastern tip, standing on the banks of the Narva River.