May is going to be a busy month for drone doom band Sunn O))). Not only will they be releasing their seventh studio album Monolithis and Dimensions on May 18 via Southern Lord, but they're also hitting the road through half of May and June. The dates will be in support of the new album, which features guest appearances by Dylan Carlson (Earth), Oren Ambarchi, Hungarian vocalist Attila Csihar, composer Eyvind Kang, and a slew of upright bass players, horn players, harpists and flutists, pianists, string ensembles, and even a Viennese women's choir led by Persian vocalist Jessika Kenney.

Before hitting Europe, they will do a few dates in Tokyo and Osaka. The group recently placed Japan's Leave Them All Behind Festival. Here are the rest of the dates:
04.21.09 - Tokyo, Japan - Earthdom !
04.22.09 - Tokyo, Japan - Earthdom +
04.23.09 - Osaka, Japan - Sunsui *
04.24.09 - Osaka, Japan - Sunsui #
05.15.09 - Oslo, Norway - Blå (Stephen O'Malley solo)
05.22.09 - Riga, Latvia - Skanu Mezs Festival
05.24.09 - Berlin, Germany - Volksbühne/Prater
05.25.09 - Rotterdam, Netherlands - Worm/Arminius Church
05.26.09 - Leuven, Belgium - Stuk/Predikheren Church
05.27.09 - Paris, France - Sonique Villette
05.29.09 - Barcelona, Spain - Primavera Sound Festival
05.31.09 - Düdingen, Switzerland - Kilbi Festival
06.01.09 - Bologna, Italy - Locomotiv
06.03.09 - Vienna, Austria - Wien Arena - Vienna
06.04.09 - Prague, Czech Republic, Sacre Coeur Church (Stimul Festival)

! Coffins

+ Jim O' Rourke

* Black Ganion

# Runzelstirn & Gurgelstock