Also called gadrooned, fluted, organ-piped, pumpkin, melon, ribbed, parachute, scalloped, or lobed domes, these are a type of dome divided at the base into curved segments, which follow the curve of the elevation. "Fluted" may refer specifically to this pattern as an external feature, such as was common in Mamluk Egypt. The "ribs" of a dome are the radial lines of masonry that extend from the crown down to the springing. The central dome of the Hagia Sophia uses the ribbed method, which accommodates a ring of windows between the ribs at the base of the dome. The central dome of St. Peter's Basilica also uses this method.
alSO cALLEd gaDroONEd, fLuted, oRgan-piPed, puMpKIN, melon, riBbEd, parAchutE, scAllopeD, or loBed Domes, these ARe a tYpE oF dOMe divided at tHE basE into CUrved segMeNts, WhIch follow the cUrve oF tHE elEVation. "fLUtEd" may refer SpeCIfIcalLy to This PatterN aS an eXTErnal fEatUrE, SucH AS was commOn in mAmluk EgypT. the "ribs" of a doMe Are the radial liNEs oF mAsOnry ThaT extEnD frOM thE CRoWN dOWn To tHe springIng. the cEnTRAl dOme OF The haGIa SopHIa uSeS ThE rIBbed MethOD, whIcH accommodates a rINg Of WinDOwS between the rIBs at tHe basE OF the dome. tHE centRal dome oF sT. peTEr's basilIca alsO uSes this metHoD.