floating fortress

Just like that Roger Moore film, Black Widow climaxes with a battle aboard a floating fortress designed by a megalomaniac genius.

From Slate ● Jul. 8, 2021

The Renown herself, whose ram had caused the fearful disaster, had not escaped without severe injury in the collision, which had shattered the mighty floating fortress in all its joints.

From The Coming Conquest of England by August Niemann

Here also the tide reaches or seems to reach the very edge of the turf; and when the light battery gallops this way, it is as if it were charging on my floating fortress.

From Oldport Days by Thomas Wentworth Higginson

She was a floating fortress, with men enough to make up the population of a town, and with stores, ammunition, and coal sufficient to last for a long term of active service.

From The Great War Syndicate by Frank Richard Stockton

When filled to the edge with warriors, it sailed o’er the waters, You’d deem it a floating fortress, or warlike abode of a monarch.

From Myths of the Norsemen From the Eddas and Sagas by H. A. (Hélène Adeline) Guerber