From the Ancient Age, fences were used as an element of protection in doors and windows. They did not stand out for any kind of ornamentation, they were really very simple. They were focused on fulfilling their purpose of protecting or closing spaces. It continued this way during the Middle Ages.
Yet, during the Romanesque and Gothic periods. The fences began to receive decorative “S” shapes, with plant or animal motifs. From just providing greater security, they now form part of the ornamental elements. It is clear that in the Modern Age they were given a greater number of decorative designs and colors. Many remnants of this period can be seen in historic centers. With the Nouveau style, grilles became an essential element as an architectural complement. They formed part of a single “work” by being included in parts of the garden and balconies.
From the appearance of the modern style and minimalism. Fences were again limited by their functionality. That is, it became important again only in terms of security and protection.