To date, the mixing of styles is most common. Such phenomena have its own name-eclecticism, which includes a variety of features of some kind of styles, while everyone, being the most common style around the world. Eclecticism, as a rule, is used at that time when another style replaces one style at once, and they as if counteracting each other. At this time, the design masters sometimes transform different styles from the past, thereby finding some completely new and most interesting combinations. Such a definition of style, in fact, is given by historians in the field of architecture. In other words, it is precisely due to the combination of some individual styles and also their unification into a single whole and a completely new style has appeared, which today is called «eclecticism».This style can be considered the most optimal solution in all those situations when it is necessary to achieve the interior to all people with completely different preferences in style. Only in this version the eclecticism will present for each tenant some place in the apartment, which he will like as much as possible. But on the very thing, everything is far from being so simple and so easy, because it is necessary to ensure that absolutely all the elements of the interior, which represent completely different styles, are combined most well, and one did not contradict the other. This is precisely the whole key task of a professional designer, because he should determine exactly the interior that any person will like that he lives within this space, but with all this, all space should be ideologically one whole.