en.wikipedia.org/wiki/Antoninus_Pius

The caption wrongly implies that both Antoninus Pius and Faustina the Elder were deified by Marcus Aurelius.

But the temple’s history shows a two-stage process:

1. Faustina the Elder was deified first, in 141, shortly after her death.
2. Antoninus Pius was added later, after his death in 161, when the temple was rededicated to both of them.

The Uffizi describes the monument as "dedicated first to the empress Faustina the Elder, deified in 141 AD ... and twenty years later to her husband, Antonius Pius, who had been deified." The Parco archeologico del Colosseo likewise says the temple was founded by Antoninus Pius in memory of Faustina, and that in 161 A.D., on Antoninus’s death, the Senate decreed that it should be dedicated to both.

So Marcus Aurelius was involved in Antoninus Pius’s posthumous honors, but Faustina had already been deified two decades earlier.

This statement is contradicted by both primary and scholarly sources.

Eusebius, writing about Constantine (who reigned long after Antoninus Pius), says that among the embassies arriving at court were envoys from "the Indians." That alone is enough to show Antoninus was not the last Roman emperor to be recognized diplomatically by Indian rulers.

A later scholarly survey in the Journal of the Royal Asiatic Society is even more explicit: after mentioning the embassy to Antoninus Pius, it lists later Indian embassies to Julian (A.D. 361) and Justinian (A.D. 530).

So the article’s wording is too absolute. Whatever one says about Antoninus’s contacts with the Kushans specifically, he was not the last Roman emperor to receive recognition or embassies from Indian polities.