One of the oldest and most interesting buildings of pre-revolutionary Nakhichevan-on-Don is the Kechekyan mansion, which is now located in the Proletarsky district of Rostov-on-Don. Built in the third quarter of the 19th century on the central square of what was then a separate city of Nakhichevan-on-Don, its construction was overseen by the famous local architect Nikolai Nikitich Durbach.

The one-story mansion with a high basement was oriented with its main facade towards the square. Later, the Sagitov mansion was added to the eastern side of the house. Behind the Kechekyan house was a courtyard with numerous outbuildings, such as an icehouse, carriage house, and stable. The main facade is executed in the classical order style.

The extreme parts of the facade are highlighted by pilaster portals. The four central windows are adorned with architraves and cornices in the baroque style. The main entrance is located on the left side, and the original wooden door has survived to this day. In the early 20th century, a dome with a spire was installed above the hallway, which was lost during the Soviet era along with some other elements.

The rooms of the mansion were arranged in two rows: along the main and courtyard facades. Three windows of the central hall faced the main facade, adjacent to which were the study and living room. The library and other living spaces had windows facing the courtyard. The basement had a separate entrance from the courtyard, where Dr. Kechekyan's study was located. A small veranda, which was destroyed during the Soviet era, adjoined the mansion from the courtyard side.

In a document from 1894, the house is described as "real estate in the city of Nakhichevan n/D on Boulevard Square No. 7, consisting of a two-story stone house with stone outbuildings and courtyard land: with an area of ten fathoms and two arshins, in the courtyard twenty-five fathoms, adjacent to the estates of Sagirov and Khojaev."

The identity of the first owner of the building is not precisely known. It is known that since 1886, the house belonged to the merchant Olga Tarasovna Khojaeva. In 1894, she sold it to Iskugi Khacheresovna Kechekyan (née Aladjalova), the wife of doctor Fyodor (Astvatsatur) Stepanovich Kechekyan. Since then, the house has been known as the Kechekyan mansion.

The Kechekyans lived in the mansion with their children. Iskugi Khacheresovna was a member of the Armenian Women's Charitable Society "Care" and the board of the "Nakhichevan n-D. Nikolayevsky Charitable Society for the Assistance to the Poor." Her brother was the artist M. Kh. Aladjalov. Fyodor Stepanovich was the city doctor, a member of the City Duma of Nakhichevan-on-Don, a member of various commissions and societies, and a knight of the Order of Saint Anna of the third degree.

After the arrival of Soviet power, the mansion was confiscated and subjected to devastation, resulting in the loss of interior decoration and some elements of the exterior appearance. In 1926 or 1929, the building housed the children's library named after Alexander Sergeyevich Pushkin, which is still located there today. The house is recognized as a cultural heritage site of regional significance.