Background: Jan van Eyck (Dutch: ['jan van 'eik]) (before c. 1390 - 9 July 1441) was an Early Netherlandish painter active in Bruges. He is often considered one of the founders of Early Netherlandish painting, and, one of the most significant representatives of Northern Renaissance art.
Context: It is known that van Eyck was considered revolutionary within his lifetime; his designs and methods were heavily copied and reproduced. His motto, one of the first and still most distinctive signatures in art history, ALS IK KAN ("AS I CAN"), a pun on his name, first appeared in 1433 on Portrait of a Man in a Turban, which can be seen as indicative of his emerging self-confidence at the time. The years between 1434 and 1436 are generally considered his high point when he produced works including the Madonna of Chancellor Rolin, Lucca Madonna and Virgin and Child with Canon van der Paele. He married the much younger Margaret probably around 1432, about the same time he bought a house in Bruges; she is unmentioned before he relocated, while the first of their two children was born in 1434. Very little is known of Margaret, even her maiden name is lost - contemporary records refer to her mainly as Damoiselle Marguerite. She is thought to have been of aristocratic birth, though from the lower nobility, evidenced from her clothes in this portrait which are fashionable but not of the sumptuousness worn by the bride in the Arnolfini Portrait. Later, as the widow of a renowned painter Margaret was afforded a modest pension by the city of Bruges after Jan's death. At least some of this income was invested in lottery.  Van Eyck undertook a number of journeys on Philip the Duke of Burgundy's behalf between 1426 and 1429, journeys described in records as "secret" commissions, for which he was paid multiples of his annual salary. Their precise nature is still unknown, but they seem to involve his acting as envoy of the court. In 1426 he departed for "certain distant lands", possibly to the Holy Land, a theory given weight by the topographical accuracy of Jerusalem in The Three Marys at the Tomb, a painting completed by members of his workshop c. 1440.  A better documented commission was the journey to Lisbon along with a group intended to prepare the ground for the Duke's wedding to Isabella of Portugal. Van Eyck's was tasked with painting the bride, so that the Duke could visualise her before their marriage. Because Portugal was ridden with plague, their court was itinerant and the Dutch party met them at the out of the way castle of Avis. Van Eyck spent nine months there, returning to the Netherlands with Isabella as a bride to be; the couple married on Christmas Day of 1429. The princess was probably not particularly attractive, and that is exactly how Van Eyck conveyed her in the now lost portrait. Typically he showed his sitters as dignified, yet did not hide their imperfections. After his return, he was preoccupied with completing the Ghent Altarpiece, which was consecrated on 6 May 1432 at Saint Bavo Cathedral during an official ceremony for Philip. Records from 1437 say that he was held in high esteem by the upper ranks of Burgundian nobility and was employed in foreign commissions.
Question: what was one of his successes?
Answer: the Madonna of Chancellor Rolin,

Background: D'Angelo was born Michael Eugene Archer, in Richmond, Virginia on February 11, 1974, to a Pentecostal preacher father. He was raised in an entirely Pentecostal family. Archer's musical talents were discovered very early on. At 3, he was spotted by his 10-year-old brother Luther, playing the house piano.
Context: D'Angelo released his third studio album, Black Messiah in December 2014, D'Angelo originally wanted to release Black Messiah in 2015, but the controversial decisions in the Ferguson and Eric Garner cases inspired him to release it earlier. On December 12, 2014, Kevin Liles, D'Angelo's manager, shared a 15-second teaser of the album on YouTube. Two days later, the track "Sugah Daddy", which had been part of D'Angelo's set list since 2012, premiered at 3 am EST and 1,000 downloads were available on Red Bull's 20 Before 15 website. After an exclusive listening party in New York, Black Messiah was released digitally on December 15 through iTunes, Google Play Music, and Spotify. The album's unexpected release was compared to Beyonce's self-titled release in 2013. On January 13, 2015, "Really Love" was released to urban adult contemporary radio in the US.  The album was met with universal acclaim from critics and it currently has a 95/100 mean score on review aggregator Metacritic. In its first week of release, Black Messiah debuted at number five on the Billboard 200 and sold 117,000 copies in the United States. In its second week, the album dropped to number twenty five on the chart and sold another 40,254 copies. In the United Kingdom, it debuted at number 47 on the UK Albums Chart with first-week sales of 7,423 copies. D'Angelo supported Black Messiah with a tour called The Second Coming. His band, The Vanguard, includes drummer Chris Dave, bassist Pino Palladino, guitarists Jesse Johnson and Isaiah Sharkey, vocalists Kendra Foster, Jermaine Holmes, and Charles "Redd" Middleton, and keyboardist Cleo "Pookie" Sample. The European leg commenced in Zurich on February 11, 2015, and concluded in Brussels on March 7.  In June 2015, D'Angelo confirmed to Rolling Stone that he was working on more material for a new album, calling it "a companion piece" to Black Messiah. In 2016 Black Messiah won Best R&B Album at the 58th Annual Grammy Awards as well as Best R&B Song for "Really Love" which also was nominated for Record of the Year. Black Messiah, Beyonce's self-titled album (2013), Run the Jewels' Run the Jewels 2 (2014), and Kendrick Lamar's To Pimp a Butterfly (2015) were noted as laying the groundwork down for the political charged releases that happened in 2016, which included Rihanna's Anti, Kanye West's The Life of Pablo, and Beyonce's "Formation".  D'Angelo performed Prince's "Sometimes it Snows in April" on The Tonight Show Starring Jimmy Fallon in April 2016 accompanied by Maya Rudolph and Gretchen Lieberum as a tribute to the late musician, appearing 'overcome with emotion' at the passing of a major influence.
Question: When was it released?
Answer:
December 2014,