"The Pons Fabricus Is The Only Ancient Bridge In Rome Still In Its Original Location And Condition. The Last Major Repairs Occurred In 23 BCE"
"One Of The Last Two Preserved Jolly Roger Pirate Flags Left In Existence"
"The Lycurgus Cup: The Only Complete Example Of Ancient Color-Changing Glass"
"The “Iron Man” Buddha - The Only Statue Carved From A Meteor"
"The Only Surviving Handwriting Of A Roman Emperor (Theodosius II)"
"The Sword Of Goujian Was Discovered Untarnished And Retains Sharp Edges After ~2500 Years"
"The Barber Cup & Crawford Cup, The Only Two Examples Of Ancient Roman Vessels Carved From Fluorite"
"The Only Known Color Photograph Of The Russian Czar's Fabled "Amber Room" - Looted By The Nazi's This Unique, Priceless Work Of Art Was Lost For Ever (Maybe?). St Petersburg, 1943"
"One Of Only Three Papyrus Fragments Written In The Phoenician Language"
"The Only Surviving Example Of An Iconic Roman “Scutum” Shield"
"Intact Bottle Of Ancient Roman Wine From 325ad"
"Ancient Roman-Egyptian Crocodile Armor"
"This Julio-Claudian Rock Crystal And Silver Spoon Is The Only Example Of Its Kind Known To Exist"
"One Of The Two Coins Found Of The Roman Usurper Silbannacus, Who Would've Been Unknown Otherwise"
"The Only Natural Fossil Of A Scorpion Made Entirely Out Of Copper"
"The Only Surviving Example Of A Crest From A Roman Centurion's Helmet"
"The Vergilius Augusteus, One Of Only Two Surviving Ancient Manuscripts To Be Painstakingly Written In Roman Square Capitals"
"First Ever Intact Ballista Arrow Uncovered In Utrecht (Augusta Treverorum), Netherlands"
"The Only Intact Bronze Lantern From Ancient Rome Next To A Reproduction. Housed In The Museo Archeologico Girolamo Rossi In Ventimiglia, Italy"
"Tombstone Of Marcus Caelius, The Only Known Example Of Direct Reference To The Varus Disaster During Which 20,000 Men Were Lost To Ambush"
"Translation: "To Marcus Caelius, son of Titus, of the Lemonian voting tribe, from Bologna, a centurion in the First Order of legio XVIII, aged 53; He fell in the Varian War. His bones - if found - may be placed in this monument. Publius Caelius, son of Titus, of the Lemonian voting tribe, his brother, set this up.""
"The Only Surviving Example Of Roman “Cestus” Boxing Gloves"
"The Only Time A Monumental Column Was Erected And Adorned With A Statue That Was Not An Emperor Was The Early 2nd Century Gilded Bronze "Emona Citizen". Housed In The Roman Lapidarium Of The National Museum Of Slovenia"
"1961 Photo Of A Screw Press Used To Iron Clothes From The Bottega Del Lanarius Or Workshop Of Lanarius In Herculaneum. This Was The Only Artifact Found In The Shop, Along With Bourbon Tunnels. No Other Examples Exist"
"The Misenum Statue Is The Only Surviving Bronze Imperial Image To Have Been Altered As A Result Of Condemnation. Domitian's Facial Features Have Been Severed From The Back Of The Head And Replaced With A New Face Representing Nerva"
"The Earliest Example Of A Proper “Book”, Written In A Totally Unique Style"
Traiectum, not Augusta Treverorum
Which would be Trier in Germany.