The Trsat castle was completely reconstructed and renovated in the 19th century when the mausoleum of the military commander Laval Nugent was built in its interior.

It was owned by Frankopan family who built the present castle, on the site occupied by the Illirian Tarsatica, to protect their holdings in Vinodol.

[1] The capture of the Castle of Trsat compelled the Ban of Croatia, Andrew Bot of Bajna (Bajna is a village in Hungary, near Esztergom)), to intervene in the Austro-Venetian war, and in June 1509 he first recaptured Trsat with his Croatian army and then entered Rijeka after expelling the Venetians.

In the year 1811, during the Napoleonic wars, Captain Hoste in pursuit of the French, arrived with his frigate at Fiume where he made himself lieutenant-governor.

[3] He had it restored in Neo-Gothic style and built a mausoleum adorned with the coat of arms of the Nugent family.