Danilo I (Serbian: Данило I, fl. 1271–72) was the fourth Archbishop of Serbs. After the death of Archbishop Sava II (s. 1263–1271) on 8 February 1271, Danilo was chosen as the next Archbishop. However, he was replaced after a year in 1272 by Joanikije I (s. 1272–1276). Archbishop Danilo II (s. 1324–1337) wrote "Archbishop Danilo succeeded on the holy seat, but due to some cause was removed".^[1] The cause of his removal is unknown, it may have been due to Danilo having been unsupportive of King Stefan Uroš I (and supportive of Stefan Dragutin); this theory is strengthened by the fact that Danilo's successor Joanikije was a fanatic supporter of Uroš I.^[1][2] It is unlikely that Danilo II did not know the cause of Danilo I's removal.^[3]

He wrote medieval biographies of Stefan Dragutin (before 1316), Stefan Milutin (after April 1332) and Helen of Anjou (1317 or soon after).^[4] In an effort to strengthen the rule of Stefan Milutin, Danilo highlighted that Helen (born as Roman Catholic) accustomed herself to and accepted Serbian Orthodox Church.^[4]