3rd decl nouns on coins

Gold aureus with Caligula and Augustus. From http://www.wildwinds.com/coins/sear5/s1807.html

PATER PATRIAE

pater patriae

Gold aureus of Septimius Severus. AD 209. Reverse: Septimius and his sons, Caracalla and Geta. From http://www.wildwinds.com/coins/sear5/s6245.html

VIRTVS AVGVSTORVM

virtūs Augustōrum

Copper As of Nero. ca. AD 65. RIC 458. From http://www.wildwinds.com/coins/sear5/s1971.html

ARA PACIS

āra pācis

Silver denarius of Otho. From http://www.wildwinds.com/coins/sear5/s2156.html

PAX ORBIS TERRARVM

pāx orbis terrārum

Silver denarius of Cleopatra and Mark Antony. From https://www.forumancientcoins.com/monetaromana/corrisp/a632/a632.html

REGINAE REGVM FILIORVM REGVM CLEOPATRAE

rēgīnae rēgum [et] fīliōrum rēgum Cleopatrae

Exempla antiqua