Daeargryn
Leonardo_da_Vinci
Pont
Ffordd
Adeilad
Argae
Concrit
Cronfa_ddŵr
Camlas
Pridd
Camlas_Suez
Goleudy
Nendwr
Adeiladu
Hydroleg
Camlas_Panamâ
Sment
Mur
Haearn_bwrw
Thomas_Telford
Samsung
Concrit_cyfnerthedig
Isambard_Kingdom_Brunel
Robert_Stephenson
Arwyddion_dwyieithog
Haearn_gyr
Cored
Peirianneg_filwrol
Crannog
Camlas_Corinth
William_Henry_Preece
Camlas_Kiel
Sextus_Julius_Frontinus
Afsluitdijk
Peirianneg_sifil
Apollodorus_o_Ddamascus
Tokyo_Skytree
Agreg
Aweddwr
John_Smeaton
Gabion
Pont_Gludo_Casnewydd
Robert_Stevenson_(peiriannydd_sifil)
Cofeb_Jefferson
Fflodiart
Pont_Humber
Gustave_Eiffel
Tirlenwi
Twnnel_y_Sianel
Tirlithriad
Atkins_(cwmni)
John_Griffith_(peiriannydd)
Hydrograff
Grwyn
Vilfredo_Pareto
Samuel_Morton_Peto
Traphont_Mohaka
Hugh_Myddelton
Sianeleiddio
Greenbelt,_Maryland
Thomas_Penson
Loc
John_Rennie
William_Jessop
Rheoli_gwastraff
Llyn_Aled
Dyn_Tyrchol_Hackney
Thomas_Brassey
Sment_Portland
The_Boring_Company
Noria
Norris,_Tennessee
Sutton_Bridge
Dinas_15_Munud
Cyrnol_Holman_Fred_Stephens
Charles_Blacker_Vignoles
James_Henry_Greathead
Edgar_Purnell_Hooley
Pont_filwrol
James_Abernethy