In the Court of the Crimson King (subtitled An Observation by King Crimson) la album phong thu đau tay cua ban nhac rock nguoi Anh King Crimson, phat hanh ngay 10 thang 10 nam 1969. Album đat vi tri #5 tai Anh, #28 tren bang xep hang Billboard 200 cua My va đuoc chung nhan vang.
Album thuong đuoc xem la tac pham đau tien thuc su the hien đuoc the loai progressive rock, khi King Crimson loai bo phan lon anh huong cua nhac blues len rock va ket hop them cac yeu to jazz va giao huong co đien. Trong tac pham Rocking the Classics (1997), nha phe binh va am nhac hoc Edward Macan ghi nhan rang In the Court of the Crimson King "co le la album progressive rock nhieu anh huong nhat tung đuoc phat hanh". Pete Townshend cua The Who phat bieu rang album la "mot kiet tac phi thuong". Trong an ban đac biet cua hai tai chi Q & Mojo Pink Floyd & The Story of Prog Rock, In the Court of the Crimson King đuoc xep o vi tri thu #4 danh sach "40 Cosmic Rock Albums". Album cung nam trong danh sach "50 Albums That Built Prog Rock" cua Classic Rock.


Bia album Barry Godber (1946–1970), mot lap trinh vien may tinh, la nguoi ve bia album. Godber mat vao thang 2 nam 1970 do nhoi mau co tim, khong lau sau khi album phat hanh. Đay la bia album duy nhat cua ong, va hien đuoc so huu boi Robert Fripp (truong nhom va tay guitar cua ban nhac). 


San xuat King Crimson bieu dien lan đau vao 9 thang 4 nam 1969, va tao đuoc su đot pha khi choi o buoi bieu dien mien phi the Rolling Stones tai Hyde Park, London vao thang 7 nam 1969 truoc 250,000 toi 500,000 nguoi.
Cac buoi thu am đau tien cho album đuoc bat đau vao đau nam 1969 voi nha san xuat Tony Clarke, nguoi noi tieng nhat vi đa cong tac voi The Moody Blues. Sau khi cac buoi lam viec nay that bai, nhom nhac đuoc cho phep tu san xuat album. Album đuoc thu am tren mot may thu 1" 8-track tai Wessex Sound Studios o London, voi ky thuat vien Robin Thompson, va tro giup Tony Page. Đe co đuoc nhung am thanh giao huong đac biet cho album, Ian McDonald danh nhieu gio đieu chinh cac lop Mellotron va cac nhac cu khac.


Tiep nhan phe binh Bai đanh gia cua Rolling Stone kha tich cuc, viet rang, "ho ket hop nhieu khia canh cua nhieu dang am nhac đe tao nen mot tac pham ky la cua su nguyen ban." Album hien đuoc xem la kinh đien, Allmusic ca ngoi no "bang cach nao đo, King Crimson đa vach nen mot loai nhac đen toi hon va sac sao hon hau-psychedelic rock" trong bai đanh gia goc va cho rang album "tao bao" trong bai đanh gia hien tai.
Trai nguoc, Robert Christgau lai rat tieu cuc va goi album "can ba phe thai".


Danh sach bai hat Thanh phan tham gia King Crimson
Robert Fripp – guitar, san xuat
Michael Giles – trong, bo go, hat nen, san xuat
Greg Lake – hat chinh, guitar bass, san xuat
Ian McDonald – nhac cu hoi (saxophone, flute, clarinet, bass clarinet), keyboard (mellotron, harpsichord, piano, organ), vibraphone, hat nen, san xuat
Peter Sinfield – loi bai hat, minh hoa, san xuat
Thanh phan ky thuat
San xuat boi King Crimson cho E.G. Productions – ' David & John'.
Thu am va chinh ky thuat boi Robin Thompson va Tony Page (cung la nguoi tro giup)
Barry Godber – minh hoa bia


Khac Bia album đuoc ve tren mot buc tuong trong phim Surf Nazis Must Die (1987) cua Troma Entertainment.


Tham khao