A tray‐shaped PdII3AuI3 complex (1) is prepared from 3,5‐bis(3‐pyridyl)pyrazole by means of tricyclization with AuI followed by PdII clipping. Tray 1 is an efficient scaffold for the modular assembly of 3×n AuI clusters. Treatment of 1 with the AuI3 tricyclic guest 2 in H2O/CH3CN (7:3) or H2O results in the selective formation of a 3×2 cluster (1⋅2) or a 3×3 cluster (1⋅2⋅1), respectively. Upon subsequent addition of AgI ions, these complexes are converted to an unprecedented Au3–Au3–Ag–Au3–Au3 metal ion cluster. Pile up gold: A PdII3AuI3 shallow concave complex was prepared by connecting peripheral pyridyl groups of a planar AuI3 complex with each other through PdII coordination. The tray‐shaped host accommodated the AuI3 planes to form three‐dimensional AuI arrays. The number of AuI3 stacks (n) was systematically tuned by the solvent conditions and the addition of AgI ions.