Bronze is one of the oldest metals known to man since the beginning of the Bronze Age over 5,000 years ago. It is considered a “living material”, subject to a natural oxidation or weathering and its natural colours range from a copper red fading through golden yellow to end in the different shades of classic browns. It emanates a warmness difficult to match with other metals. Contemporary architecture is rediscovering the value and beauty of this noble metal, which was the principal performer in windows and doors of representative commercial buildings and residences of the 18th and 19th century.