
A fo ben bid bont! Dyna ddywedodd Bendigeidfran yn chwedl Branwen wrth iddo orwedd ar draws yr afon i fod yn bont i’w filwyr.
Ond y Rhufeiniaid nid y Celtiaid gyflwynodd y gair pont i’r Gymraeg. Daw ‘pont’ o’r gair Lladin ‘pontis’.
Dr Leona Huey, darlithydd mewn treftadaeth ym mhrifysgol Bangor sy’n egluro sut roedd gan y Rhufeiniaid arbenigwyr i adeiladu ffyrdd a phontydd:
“Mae o’n broject reit anhygoel i adeiladu ffordd yn null y Rhufeiniaid.
“Mae yna bump haen i lôn Rufeinig. Roedd yr haen gyntaf wedi ei greu o dywod a cherrig bach, yna roedd yr ail haen wedi ei wneud o gerrig mwy i wneud yn siŵr fod y ffordd yn sefydlog.
“Y trydydd haen wedyn oedd cymysgedd o galch a rwbel.
“Yna roedden nhw’n isio rhywbeth reit gadarn oedd ddim yn mynd i symud na’i ddinistrio gan ddŵr felly nucleus oedd y pedewerydd haen, sydd fel concrid i ni heddiw.
“Mae hynna yn creu sylfaen reit dda i bumed haen sef cerrig mawr oedd yn cael eu gosod yn dynn at ei gilydd ac yn creu llwybr esmwyth i filwyr gerdded arno.”
Yn ôl Leona, roedd ganddyn nhw adrannau arbenigol yn eu byddin i adeiladu ffyrdd ac adran hefyd i adeiladu pontydd.
Eglura: “Cyn i’r Rhufeiniaid gyrraedd doedd ganddon ni ddim gair am bont achos doedd ganddon ni ddim y dechnoleg. Felly mae pont yn air Lladin – nhw sydd wedi dod â’r dechnoleg yna i ni.”
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