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The line between free construction and buildings that need administrative resolution is often thin when it comes to removable lighting coverage. Pergola is a delicate issue, given the violations of the rules of urban development, abuse of office and violations of demolition procedures (the latter fact, however, unlike the first, never appears in documents and can be found even after several years, despite the subsequent owners of the building, regardless of whether they participated in construction). 
To clarify the numerous doubts, the recent decision of the Council of State (sent on 30/01/2017 on 30/01/2017.), which is real guide in the field of awnings, arbors, pergolas and pergont. Let's see what established the pronunciation in comment.
The pergola is an open construction, it is open on three sides and on top. It is designed to decorate or shade gardens or terraces and is therefore made of wood, usually pergolas are used to support  plants. The construction consists of two (or more) rows of vertical racks joined together by horizontal elements located at a height that allows people's free move.
Do you need a permit to build a gazebo?
Pergola usually does not require a building permit. CILA requires an application that is approved by the municipality within 30 days before the installation of the pergola. In some municipalities (including Foggia), if the surface area exceeds 20 square meters or if the pergola is attached to the wall of the house, in addition to CILA you need to have a seismic calculation with a deposit in CIVIL GRIIS.
In the past, the State Council confirmed that the pergola has only a decorative function, the pergola is made of "light wooden construction or other material with a minimum weight".
Pergola does not need administrative resolution, if it can be dismantled, because it has no foundation, and is a structure for supporting plants, can be shelter and shading of small surfaces [Cons. St. Sent by n. 5409/2011 from 29.09.2011.
Pergola can be covered, its upper part (or any other part) has a coating that is not easily removed (it is made of any material). In this case, rules are used for constructing canopies. If you have a cover, in addition to CILA, you need a settlement with a deposit for civil engineers. In some cases, the surface can not exceed 20% of the house
In this situation, we note the recent proposal of the Thar Campaign that a pergola open on three sides does not require a building permit.
Pergodenda is defined as simple outdoor furniture. When it has a small size, it does not change its mission to use for open spaces and is easily and fast removed, as a result  its installation is part of the "free building" and does not require any permission to assemble the Const. St. Sent from 1777/2014.
In some municipalities, several types of surfaces are defined? that are more than 20 square meters, this is the difference between a fully open pergolent fabric or aluminum profiles and semi-divided ones, it is made of fabric or aluminum profiles that work on one side, thanks to this the roof is completely open, and those that are have a rotation of profiles that allow the light to enter, so the latter are use the rulese for constructing canopies, in addition to the CILA, you need appropriate calculations, if the designs are leaning to the wall, or if they are installed on the terrace or in the courtyard.
The word sauna is an ancient Finnish word with an etymology that is not entirely clear, but which probably could have been originally linked to the meaning of winter residence. To get a feeling of greater heat, steam was produced by throwing water on stones that had been heated over the fire until it became hot. This device made  possible to increase the temperature and allow people to take off their clothes.
The first saunas were heated with a fire made of wood and the smoke (in Finnish savu) was let out in the room after it (the Finnish "savusauna" recalls this custom).
People used  bath as a sauna and as a home in Finland until the nineteenth century, although there were exceptions due to poverty or temporary use of saunas, in the documents of the twelfth century that managed to find the description of the separation of houses and saunas.
From a hydrotherapeutic's point of view the Finnish sauna would be linked to an ancient tradition of natural medicine which in the West has been handed down mainly through the teachings of Hippocrates by Coo and Galeno (and subsequently by Sebastian Kneipp and Vincent Priessnitz) and has known its maximum diffusion with the calidarium (laconicum), tepidarium and frigidarium of the Roman baths and with the next Turkish hamam (from the Arabic "to heat"), from which we can find traces also in other traditions from the Japanese mushiboro, the Russian banja, the hut of the sweat of the Eskimos or of the American Indians, to the Mexican temazcal.
Alongside the therapeutic properties, for many peoples, including the Sioux Indians, the sweat bath also represented an absorbent function.
This is an original sauna in which the temperature can reach 80-100 ° C, causing a profuse sweat of the skin, and the humidity does not exceed 10-20% if you throw water on the stones. Sometimes essential oils with a balsamic effect, such as pine or eucalyptus, are added to the water.
The furnaces can be wooden or electric.
Usually the use of the sauna includes alternating a sauna with cold baths or cold showers.
The environment in  the Turkish bath is saturated with water vapor (100% humidity); inside it is formed a vapor with a stratified temperature (from 20/25 ° C to a stop level at 40/50 ° C at the head level), which, covering the skin, reduces sweat.
Transpiration is usually less intense than in a Finnish sauna, it is offset by longer periods of stay (so at the end you can lose more fluid).
It is proved that after the sauna there is psychophysical relaxation, anxiety reduction and energy sensation.
The sauna deeply detoxifies and therefore makes the skin elastic and rosy, and the tissues are more elastic. It also helps to relax and helps to sleep at night.
Blood and lymphatic circulation also improve, and the activity of the skin, tissues and glands increases.
A plentiful sweating caused by the sauna, removes about a liter of water and thoroughly cleanses the skin, removes impurities and toxic substances. Obviously, however, that the loss of fluid should be restored at the end by drinking herbal teas and water. Therefore, the sauna does not help lose weight, but certainly helps improve metabolism.
It is known that people who suffer from hypertension, pulmonary or cardiac diseases and with circulatory problems contraindicated saunas. However, for beginners it is always advisable to seek medical advice before starting treatment with thermal baths.