Banquette

A banquette (French pronunciation: [bɑ̃kɛt]), rampart walk or parapet walk is a small footpath or elevated step along the inside of a rampart or parapet of a fortification.

Musketeers atop it were able to view the counterscarp, or fire on enemies in the moat.

Typical they are around foot and a half (half a metre) high, and almost three feet (approximately 90 cm) wide.

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Banquette (along the wall on the right) on the Alhambra fortress in Spain.