Biorramaid

Tha biorramaid neo piorramaid na structair aig a bheil bun ceàrnach agus ceithir taobhan a chlaonas gu binnean.

Biorramaidean anns an fhàsach

Bidh cuid de seann chàrn-chuimhne Èiphiteach air a bheil air chumadh biorramaide. Bha biorramdean aig na Aztecs, Mayanaich agus Babiloniaich cuideachd.

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