1. Ships

Velikiy Knyaz Konstantin or Grand Duke Constantine may refer to:

• One of several Russian Grand Dukes of the Royal House of Romanov, see Konstantin Romanov (disambiguation)
• Fort Grand Duke Konstantin, a fort defending the harbour of Kronstadt, near St. Petersburg, Russia

Ships

• Russian tender Veliky Knyaz Konstantin, a torpedo boat tender of the Russian Navy launched in 1857
• Velikiy Knyaz Konstantin, a 120-gun ship of the line of the Russian Black Sea Fleet, launched 1852, which participated in the Battle of Sinop

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