The distinctive prismatic form of this 35-story office tower, housing the headquarters of a major bank, is the product of a subtractive operation applied to an orthogonal form transforming it dramatically in accordance with precise and rigorously applied geometric parameters. The resulting volume creates a striking silhouette in Istanbul’s skyline. At street level, the tower addresses a generous entry plaza on one side, while on the other, it is joined to an extensive stone-clad base containing dining, conference, and gathering spaces above several levels of parking and supporting, at its opposite end, a smaller 12-story office block.