The Oiselinière estate was, before the French Revolution a 'Seigniory'. It is mentioned as early as 1335 in the charter 'Les Actes'. It spreads over the districts of Gorges and Clisson, and under the feudal system depended on the Seigneurs of Clisson and Pallet. For 643 years, this Seigniory only changed families four times: Maurice le Meigen was the owner, then in 1460 one of this descendants through allegiance, Claude Grézeau took over. His family sold the seigniory of the Oiselinière to Jean Goulet de la Fosse de Nantes in 1613. Louis de la Bourdonnaye acquired the property in 1658. Then in 1767, the seigniory was sold to the ancestors of the Aulanier family (This family made a great contribution in the Second World War, Oselinière being a hotbed of resistance).
The castle is a villa built in Italian style between 1822 and 1835 to enclose a square courtyard dated from the 17th century. The villa, the outbuildings, the orangery and the gallery of 'Les Illustres' are included in the inventory of historical monuments since 1997 and are cited as reference in the inventory 'Clisson or return to Italy.'
To the west of the villa, near the orangery stands a set of architectural interest with six niches on its main facade which are made of circular brick and adorned with busts of famous men. From left to right, we can recognize Olivier de Clisson, Conde, Duquesne, Jean Bart, and Bayard Duguesclin.
The Kalozha church of Saints Boris and Gleb is the oldest extant structure in Hrodna. It is the only surviving monument of ancient Black Ruthenian architecture, distinguished from other Orthodox churches by prolific use of polychrome faceted stones of blue, green or red tint which could be arranged to form crosses or other figures on the wall.
The church is a cross-domed building supported by six circular pillars. The outside is articulated with projecting pilasters, which have rounded corners, as does the building itself. The ante-nave contains the choir loft, accessed by a narrow gradatory in the western wall. Two other stairs were discovered in the walls of the side apses; their purpose is not clear. The floor is lined with ceramic tiles forming decorative patterns. The interior was lined with innumerable built-in pitchers, which usually serve in Eastern Orthodox churches as resonators but in this case were scored to produce decorative effects. For this reason, the central nave has never been painted.
The church was built before 1183 and survived intact, depicted in the 1840s by Michał Kulesza, until 1853, when the south wall collapsed, due to its perilous location on the high bank of the Neman. During restoration works, some fragments of 12th-century frescoes were discovered in the apses. Remains of four other churches in the same style, decorated with pitchers and coloured stones instead of frescoes, were discovered in Hrodna and Vaŭkavysk. They all date back to the turn of the 13th century, as do remains of the first stone palace in the Old Hrodna Castle.
In 2004, the church was included in the Tentative List of UNESCO"s World Heritage Sites.