While Kogelnik was in London in 1966, her New York studio space was engulfed in an enormous fire. Although Kogelnik had just moved out prior to the fire, her downstairs neighbor, American artist Alfred Leslie, lost his entire artistic output. That same year, Kogelnik married radiation oncologist Dr. George Schwarz in London, giving birth to her son Mono in 1967, returning to New York shortly thereafter. In 1969, Kogelnik created a "Moonhappening" during the lunar landing of Apollo 11 at the Galerie Nächst St. Stephan in Vienna, producing a series of lunar-themed silkscreens during the live broadcast.