The National continued working with Katis throughout the rest of the decade. Following the release of an EP, Cherry Tree, in 2004, the band signed with Beggars Banquet and released Alligator. Although sales were modest, Alligator proved to be one of the year's most critically approved releases. Released in 2007, Boxer, an ambitious effort that featured orchestration by the Clogs' Padma Newsome and piano by Sufjan Stevens, fared similarly well. It also became the band's first album to chart fairly well, peaking at number 67 on the Billboard 200.
A documentary by French filmmaker Vincent Moon was released in 2008, capturing the band during the Boxer recording sessions. That same year, the National released The Virginia EP, a collection of new material and various B-sides, and began working on a new studio album with Katis. High Violet appeared two years later, earning the guys the highest marks of their career and going gold in multiple countries. Trouble Will Find Me, the group's sixth long-player, was issued in 2013 and featured guest appearances from Sharon Van Etten, Sufjan Stevens, Dark Dark Dark's Nona Marie Invie, St. Vincent, Doveman, and Arcade Fire's Richard Reed Perry. The Grammy-nominated album peaked at the number three slot on the Billboard 200. In 2015 the group issued a limited-edition nine-LP box set entitled Lot of Sorrow, which chronicled the group's epic 2013 MoMA-hosted performance art collaboration with Icelandic artist Ragnar Kjartansson, which saw the band perform the song "Sorrow" (from High Violet) for six straight hours (105 times). ~ Andrew Leahey, Rovi