When Wlodzimierz Umaniec defaced Mark Rothko's Black on Maroon at the Tate Modern in London, the 26-year-old Polish man may not have expected he’d be facing any jail time. But a judge sentenced Umaniec on Thursday to two years behind bars for vandalizing the mural on Oct. 7. Umaniec, who wrote his name and the phrase "12 a potential piece of yellowism," said he was trying to start a discussion about a new artistic movement. According to Sotheby’s, the pre-damaged value of the painting was roughly £9 million. The restoration work is expected to cost about £200,000 and take about 20 months.