Drum (architecture)

Definition and stakes

Charles Herbert Moore,  Character of Renaissance Architecture (1905)

“ The most noticeable part of the composition is the exterior, which completely masks the inside. The drum (Fig. 80) is a polygon of sixteen sides, and is in two stages, the lower one of which is solid, and rises above the springing of the vault, while the upper stage, in the form of an open arcaded gallery, with an attic in retreat, reaches far above the haunch of the dome which is covered with a low-pitched roof of timber crowned with a lantern. The lower stage has an order of pilasters with a nondescript entablature, having an enormously high frieze ornamented with an engaged balustrade. ”
Source: Wikisource

Portrait of Vitruvius Pollio Vitruvius Pollio,  The Ten Books on Architecture

“ Then another rope is wound round the drum and carried to a capstan, and when that is turned, it turns the drum and the axle-tree, the ropes get taut as they wind round regularly, and thus they raise the loads smoothly and with no danger. But if a larger drum is placed either in the middle or at one side, without any capstan, men can tread in it and accomplish the work more expeditiously. ”
Source: Gutenberg

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