In the past, the European part of the Russian Empire was known as a land of noble estates. Here, one could encounter a variety of estates: from large and luxurious to modest ones, executed in the neo-Russian style, with elements of eclecticism and Gothic. The Art Nouveau style was particularly popular. One such estate, Vorobyovo, is located in the Maloyaroslavets district of the Kaluga region and belonged to the famous surgeon Sergey Petrovich Fyodorov.

The house was designed by Swedish engineer Gunnar Svenson, which explains the Scandinavian motifs in the architecture. A tall tower with narrow windows reminiscent of the arrow slits of medieval castles particularly attracts attention. The architect meticulously worked on every detail of the facade: the door was asymmetrically designed with a massive column, and the decorative brackets of the roof, balcony railings, and canopies were made of wood. The estate was surrounded by a magnificent park, where 100 larches, 25 cedar pines, and firs were brought from a nursery in Krasnodar, along with about 200 fragrant thuja, as many hawthorn bushes, and nearly 1000 apple trees. It is said that apples from this garden were even exported to England. In the garden, one could relax, enjoying irrigation from a hydraulic ram powered by four ponds. A new riverbed was dug closer to the house, and a dam created a pond with a boathouse and two bathing areas on the banks.

Sergey Fyodorov cared not only for himself but also for the local residents. In 1904, at his expense, an outpatient clinic for peasants and a parish school were built. The estate survived the revolutions and the Civil War, but in 1940, severe frosts destroyed the entire garden. Later, the estate housed a rest house for the All-Union Central Council of Trade Unions, and after the Great Patriotic War, a sanatorium was established there, which still operates today.