An orangery is a type of garden, building or a room which was designed to protect citrus trees. For example trees like oranges, lemons etc., the main purpose to build an orangery is to protect delicate fruits, especially oranges and lemons which could not survive harsh winters in the outdoors. Orangery it is a warm, sheltered place where trees like orange trees citrus trees are grown in cooler climates. Orangeries are initially built or constructed on grand estate to protect the citrus trees during the winters. Orangeries were generally built facing south to take advantage of the maximum possible light to protect the citrus trees from harsh winters in the outdoors. Straw was originally used as insulation, with some orangeries in northern Europe using open fires or stoves to produce enough heat for the plant. Heating was also introduced through hot air flues, steam and piped hot water in order to provide pineapples and grapes with high temperatures and moisture they needed. These are usually constructed using brick or stone bases, stone pillars and a corbel gutter. Orangeries are also featured with large, tall windows to maximize available sunlight in the afternoons. The north facing walls are built without windows with a heavy solid brick or with much smaller windows to be able to keep the rooms warm. An orangeries have less than 75% glazed roof. Orangeries did not have any glazing on their roofs until the early 1900s. The arrival of pineapples from South America and grapes from the Mediterranean led to the invention of pitched glazed roofs to maximize the light and heat that these plants needed to thrive in these structures.

Orangery was originated in the 16^th century, mainly in Europe, particularly in Italy, France and later England.  The first orangeries to be created originated in Italy and featured as part of the Renaissance Gardens. Early orangeries were built against an existing garden wall, separate from the main house, like a summer house would be, with a brick or stone base to support the expensive glass panes. The great period of the orangery, when few great gardens were without one, extended from the latter half of the 17^th century into the early 18^th century.

Orangeries are similar to a greenhouse in function, but styled more like a classic conservatory, its main task was providing delicate, exotic plants with shelter and protection beyond that of a brick fruit wall. The name therefore reflects the original use of the building as a place where citrus trees were often wintered in tubs under cover, so that they could survive through harsh frosts. Early orangeries were constructed with bases and pillars made from brick or stone, with large panes of glass to let in the sunlight and warmth. Often people used to utilize an existing garden wall but as they became more popular their construction was increasingly influenced by designers and architects which then led to the connection between the house and architectural orangery design.

However, orangeries were not affordable to everyone as because of large amounts of expensive glass, and as homes to exotic plants, orangeries were usually found in the gardens and grounds of wealthy, fashionable residence. This soon became symbols of status among the wealthy.

However, orangeries were prone to leaking, extreme weather fluctuations, and degradation.

In today’s days orangeries are used less for wintering tropical plants, and more as additional living space within the home which unifies the boundary of the garden and the inside. Retaining classic features such as solid base and pillars, along with the expenses of glass, orangeries are designed to blend seamlessly with the original building, opening it up and letting light flood into the house.In the 21^st century orangeries are built as an extension to a home and they provide bright and elegant extra living space. Orangeries aren’t just extensions for the house, they are also used as commercial premises. These are used in various type of commercial uses including Orangery restaurants, some companies operate their businesses from orangery structures for a variety of reasons from lighting to brand image.

In fact orangeries are more energy-efficient than a regular extension since they allow more of light to enter the room.