Here is his biography from Czech Wikipedia:
He was born in Bačetín near Dobruška in the foothills of the Orlické Mountains in the family of gardener Jan Matějů and his second wife Anna b. Nude from Mezilesi. Celestin already showed talent for drawing and later for painting in his childhood. He had two half-brothers from his father's first marriage (Josef and Antonín) and six siblings (brothers Jan, Stanislav, Adolf, Bohumil and sisters Anna and Emília). He attended public school in his native Bačetín and later lived in Červený Kostelec. He went to Vienna to study painting and graphic design, and after returning from his studies he lived and created in Červený Kostelec. In December 1908 he married Eliška Beková in Prague and they lived first in Žižkov and later in Královské Vinohrady. In 1909 their son Vilém was born, and a year later another son Rudolf. During his stay in Prague, he painted countless pictures in which he captured the gradually disappearing corners of this city. In 1924 he donated to the newly built chapel of Sudín an image of Saint Anne, to whom the building is dedicated. During the summer months of 1925 he stayed in Náchod and exhibited the paintings created there. In October 1937, Celestin Matějů became a widower and around 1940 he left Prague and settled in Kolince near Klatov with his second wife Anna Matějů, née Mertlová. Here he lived and worked in house No. 202, and also had a studio there. He created many paintings here, mostly miniatures, with which he presented his knowledge and often paid services with them. In his work he mainly paints landscapes, but he is also a skilled portrait painter and paints still lifes and flowers. Reproductions of paintings by Celestin Matějů, mainly from Náchodsk, were published on a number of postcards.
Exhibitions: 1909 - "Wild" Exhibition, Topič Salon (1906–1911), Prague; 1924 – Červený Kostelec; 1925 – Náchod, amphitheater of the municipal theatre; Rychnov nad Kněžnou (exhibited over 100 paintings, drawings and cartoons)
Literature: dictionary of Czech painters by Prof. Toman, Prague, 1966; Online Wikipedia in Czech.
inscriptions: signed lover on the right; on the back of the painting: original author's title in German: "Stadt garden..., Prag".
Technique: oil on cardboard, original period gilt frame.
Dimensions: without frame 53 x 41 cm; framed 58 x 46 cm.
Condition: very good.