Born with a German name, Ivan Petrov assumed the role of quintessential Russian bass during the age between Mark Reizen and Alexander Pirogov and Evgeny Nesterenko, who followed a generation after. Endowed with a generous instrument -- solid, long-ranged, and refined -- Petrov attained first rank among the low-voiced singers at Moscow's Bolshoi and held his position for more than two decades. The onset of diabetes caused his retirement at age 50, but not before he had left an imposing recorded legacy. Petrov's family were naturalized Germans, resident in Russia under the name of Krause for several generations. His father had descended from a tradition of engineers and scientists, but singing, too, had been an integral aspect in the succeeding generations of the Krause family. After a childhood in Siberia during which he spent in his favorite pastimes of volleyball and football, Johann Krause moved with his parents to Moscow in 1936. The specter of German ambition overshadowed the Soviet Union at the time and those bearing German surnames were suspect. Hence, the family chose a new name and the teenager became known as Ivan Petrov. Through his studies at the Moscow Conservatory, Petrov's bass voice began growing noticeably in size and compass. At age 19, he was already working on arias of advanced difficulty; the following year, he was engaged by tenor Ivan Kozlovsky and the Moscow Philharmonic Society. He joined the ensemble in tours of operas presented in concert format. In 1941 alone, after his country was under attack by Germany, Petrov participated in many of the hundreds of performances given for soldiers both on front lines and recuperating in hospitals. In 1942, Petrov auditioned for the Bolshoi Theater and was engaged, becoming a member of the Soviet Union's most prestigious opera theater at the age of 22. In 1947, Petrov was a member of a delegation of young Russian artists sent to the First World Youth Festival in Prague and won a gold medal. Budapest, too, acknowledged his qualities as a singer when he appeared there in 1949. Despite the presence of more established basses, Petrov made himself known at the Bolshoi, first in small roles, soon thereafter in leading parts. By the 1950s, he had become one of the theater's leading artists. During his distinguished career at Russia's great theater, Petrov won several Stalin Prizes for his work in a repertory that came to embrace some two and a half dozen leading parts. Among his most acclaimed were Boris Godunov, Dosifei in Mussorgsky's Khovanshchina, Ruslan in Glinka's Ruslan and Ludmilla, Don Basilio, Kochubei in Tchaikovsky's Mazeppa, Méphistofélès in Gounod's Faust (his favorite), and King Philip in Verdi's Don Carlo. A recording of Verdi's Requiem conducted by Igor Markevitch (with soprano Galina Vishnevskaya) demonstrates Petrov's assured sense of Verdian line and dramatic intensity. In 1964, when singing Prince Igor with the Bolshoi at Milan's La Scala, Petrov was honored by the daughter of the famed Russian bass-baritone Feodor Chaliapin when she presented him with a ring her father wore for performances of Boris Godunov. By that time, Petrov had sung the part in venues far afield from his home theater, also offering his Gounod devil in numerous opera houses in Eastern Europe, Scandinavia, and Western Europe. In the years of his prime, the bass also won a positive reputation as a recitalist, appearing with his accompanist of three decades' association, Semyon Stuchevsky.