==History==The origin of the term is unknown but may be derived from Latin "trans", "through," and "foratum", "bored, drilled, cut," as it was a hollow passageway from one end of the building to the other, as suggested by the "Trésor de la langue française.
Lahko se pojavi na ravni zgornjih (nadstropnih) oken, ali pa se nahaja kot ločena stopnji pod zgornjimi okni.