Iseult's apartment at St. Lubin.—A curtain hung from the ceiling cuts off one-third of the room. This third is raised one step above the rest of the room. The background is formed by a double bay-window through which may be seen the tops of some pine trees. In front of a couch, on a small table, stands a large gold shrine in which rests the magic brachet Peticru, a toy of jewels and precious metals. Beside it stands a burning oil torch. The remaining two-thirds of the room are almost empty. A table stands in the foreground; on the floor lies a rug on which are embroidered armorial designs. In the middle and at both sides are wide double doors. Iseult sits on the couch before the shrine. She is clad in a fur-trimmed robe. Brangaene loosens Iseult's hair which is divided into two braids. The cold, gray light of dawn brightens gradually; the rising sun falls on the tops of the trees, coloring them with a flood of red and gold.