Acts 2:30 προφήτης οὖν ὑπάρχων καὶ εἰδὼς ὅτι ὅρκῳ ὤμοσεν αὐτῷ ὁ θεὸς ἐκ καρποῦ τῆς ὀσφύος αὐτοῦ καθίσαι ἐπὶ τὸν θρόνον αὐτοῦ,
Therefore, being a prophet, and knowing that God had sworn with an oath to him that of the fruit of his body, according to the flesh, he would raise up the Christ to sit on his throne,
Noun: Accusative Singular Masculine

Revelation 4:2 εὐθέως ἐγενόμην ἐν πνεύματι καὶ ἰδοὺ θρόνος ἔκειτο ἐν τῷ οὐρανῷ καὶ ἐπὶ τὸν θρόνον καθήμενος,
Immediately I was in the Spirit. Behold, there was a throne set in heaven, and one sitting on the throne
Noun: Accusative Singular Masculine

Revelation 12:5 καὶ ἔτεκεν υἱόν ἄρσεν, ὃς μέλλει ποιμαίνειν πάντα τὰ ἔθνη ἐν ῥάβδῳ σιδηρᾷ. καὶ ἡρπάσθη τὸ τέκνον αὐτῆς πρὸς τὸν θεὸν καὶ πρὸς τὸν θρόνον αὐτοῦ.
She gave birth to a son, a male child, who is to rule all the nations with a rod of iron. Her child was caught up to God, and to his throne.
Noun: Accusative Singular Masculine

Revelation 13:2 καὶ τὸ θηρίον ὃ εἶδον ἦν ὅμοιον παρδάλει καὶ οἱ πόδες αὐτοῦ ὡς ἄρκου καὶ τὸ στόμα αὐτοῦ ὡς στόμα λέοντος καὶ ἔδωκεν αὐτῷ ὁ δράκων τὴν δύναμιν αὐτοῦ καὶ τὸν θρόνον αὐτοῦ καὶ ἐξουσίαν μεγάλην.
The beast which I saw was like a leopard, and his feet were like those of a bear, and his mouth like the mouth of a lion. The dragon gave him his power, his throne, and great authority.
Noun: Accusative Singular Masculine

Revelation 16:10 Καὶ ὁ πέμπτος ἐξέχεεν τὴν φιάλην αὐτοῦ ἐπὶ τὸν θρόνον τοῦ θηρίου καὶ ἐγένετο ἡ βασιλεία αὐτοῦ ἐσκοτωμένη, καὶ ἐμασῶντο τὰς γλώσσας αὐτῶν ἐκ τοῦ πόνου,
The fifth poured out his bowl on the throne of the beast, and his kingdom was darkened. They gnawed their tongues because of the pain,
Noun: Accusative Singular Masculine

Revelation 20:11 Καὶ εἶδον θρόνον μέγαν λευκὸν καὶ τὸν καθήμενον ἐπ' αὐτοῦ / αὐτόν, οὗ ἀπὸ τοῦ προσώπου ἔφυγεν ἡ γῆ καὶ ὁ οὐρανός καὶ τόπος οὐχ εὑρέθη αὐτοῖς.
I saw a great white throne, and him who sat on it, from whose face the earth and the heaven fled away. There was found no place for them.
Noun: Accusative Singular Masculine