31348512fortification elementsPT2026-03-30 20:34:02UF31348513elements, fortificationNDUF31348514fortification elementNDBT31322816architectural elements by building typePTBT31350799fortificationsPTNT31378476casematesPTNT31378478batteriesPTNT31378482baileysPTNT31378488keepsPTNT31378495outworksPTNT31378498cavaliersPTNT31378500fortification openingsPTNT31378503[defensive walls and defensive wall components]PTNT31378504[bastions and bastion components]PTNT31378505mottesPTNT31378508tenshuPTNT31378509chevaux de frisePTNT31378514inundation sluicesPTNT31378516cunettesPTNT31378518ravelin ditchesPTNT31483909dítáiPTNT31483910dūntáiPT