Mae'r cwcis hyn yn gwbl angenrheidiol ar gyfer weithrediad y wefan.
Rydym yn defnyddio Google Analytics i fesur sut ydych yn defnyddio'r wefan er mwyn i ni ei wella yn seiliedig ar angen defnyddwyr.
Gall y cwcis hyn gael eu gosod gan wefannau trydydd parti a gwneud pethau fel mesur sut rydych yn gwylio fideos YouTube.
Amgueddfa Cymru
Photograph of Rhymney ironworks during the 1880s. Union (east bank) mills and forges with Nos.7, 8 and 9 blast furnaces in background, with Bessemer cupolas just visible to their left (west). Blowing engine house between furnaces and mills, and coke ovens just visible in smoke above and behind furnaces. Bessemer department in twin-gabled building in distance on extreme left; limekiln recessed into tip and Rhymney Railway in foreground. Post dates erection of second Bessemer pit in 1880/81. Predates closure of works in 1891.
Identical view to 64.539/4 (2).