Upon his return from Russia he started work at the Finance Ministry, a job that involved travel in the country. ‘‘Everywhere I went I saw big problems, tension, although there were areas where things were not that bad,’’ he wrote.
Mr. Horn married Anna Kiraly in 1956, and he left finance for foreign affairs in 1959. He was assigned as an attache to Sofia in 1961 and later to Belgrade.
For the next 16 years Mr. Horn worked in the foreign affairs section of the Communist Party’s Central Committee. In April 1985, he became deputy foreign minister and on May 11, 1989, foreign minister.
He leaves his wife and two children, Anna and Gyula Jr.