The collection includes correspondence, manuscripts, documents, and photographs, chiefly form the third quarter of the nineteenth century. There are also letters from Fedor Chechulin to his wife, from 1856-1865, in Swedish with later Russian translations; documents and other correspondence from 1847-1877; a manuscript about the family by Ekaterina Maĭdel;́ several family photographs; and a memoir by Polina Petrovna Chechulina about her experiences as a physical development instructor for the family of Grand Prince Konstantin Konstantinovich from about the end of the nineteenth century to World War I.