O letter
Obsolescence
The state of being no longer needed because something newer or more efficient has been invented. The term in architectural point of view refers to structures that are being demolished for having outmoded mechanical systems or insufficient rentable place, or suddenly unappealing stylistic expression among other factors.
Order
Architectural reality is characterised by a constant struggle against disorder. In architecture order refers to a system of rules that structure the shape, structure, layout and proportions of a design. Order is an indispensable functioning of any organised
system. Principles of order are axis, symmetry, hierarchy, transformation, datum, rhythm, pattern, and repetition.
2. Order in architecture is also a technical term for a column and its related elements - in particular its top (the capital). Since
Greek architecture provides the pattern of classicism, the differing Greek styles have become standard terms in the vocabulary of architecture. The three orders which feature most frequently in classical buildings are the Doric, the Ionic and the
Corinthian.
Originator
The person(s) who designed or created the cultural property, or the person(s) representing the creator or designer of the cultural property by legal, moral, or spiritual right.
Outdoor Architectural Museum (also Open air museum or Skansen)
Involves entire buildings displayed in an open-air environment. The museum may include endangered buildings which have been moved to the site, reconstructions of non-extant buildings or recreations of buildings characteristic of a particular era.
Outstanding Universal Value
Attributes and aspects of a property which are associated in expression of universal value. Attributes can be tangible or intangible. The Operational Guidelines indicate a range of types of attribute which might convey Outstanding Universal Value, including: form and design, materials and substance, use and function, traditions, techniques and management systems; location and setting; language, and other forms of intangible heritage; and spirit and feeling; beliefs, stories, festivals, rituals.