Boichuk's sacred works include his watercolor paintings, which have survived up to these days. One of these paintings is the composition “Angel's Head”. Mykhailo Boichuk's desire to reconsider the inner essence of the Biblical images, to depict them in the style of an artist of the twentieth century, and to embody his creative method, which would combine Byzantine traditions with the latest search for means of artistic expression, is reflected in his sacred works, namely in icons, projects of monumental paintings, drawings, and sketches. In 1973, this unique exhibit item got into the collection of Lviv National Art Gallery from the private collection of Yaroslava Muzyka, who closely worked with Boichuk and his followers during the Lviv period of the artist's life. Yaroslava Muzyka lived in a house on Charnetskyi Street (now Vynnychenko Street, 26), where Boichuk's studio was located; she managed to preserve a significant amount of archival material and some works that remained after the artist’s moving to Kyiv.