Panzer VIII Maus
Panzerkampfwagen VIII Maus ("Mouse") was a German World War II super-heavy tank completed in late 1944. It is the heaviest fully enclosed armoured fighting vehicle ever built. Five were ordered, but only two hulls and one turret were completed before the testing grounds were captured by advancing Soviet military forces.
Pierre Guillaumat (supertanker)
Pierre Guillaumat was a supertanker, built in 1977 by Chantiers de l'Atlantique at Saint-Nazaire for Compagnie Nationale de Navigation. "Pierre Guillaumat", which was the third vessel of Batillus class supertankers (the other three, slightly smaller, were "Batillus, Bellamya" and "Prairial"), is distinguished as the biggest ship ever constructed (by gross tonnage, a value based roughly on internal volume, not mass). It was surpassed in length, deadweight tonnage(≈cargo mass), and displacement, only by "Seawise Giant" (later "Jahre Viking, Happy Giant" and "Knock Nevis"), which, though it was originally smaller when it was built in 1976, was subsequently lengthened and enlarged.