superstruction

plural superstructions

1. archaiccountableuncountableThe act of superstructing, or building upon.

   The wall has been thickened to give dept to the gateway, and possibly to allow of the superstruction of a low tower above it.

   1852, George T. Clark, “Kidwelly Castle”, in The Castles of Kidwelly and Caephilly, and of Castell Coch, London: W. Pickering, page 8

2. archaiccountableuncountableThat which is built on some foundation; an edifice; a superstructure.

   Since virtuous superstructions have commonly generous foundations, dive into thy inclinations, and early discover what nature bids thee to be, or tells thee thou may’st be.

   1716, Thomas Browne, edited by Samuel Johnson, Christian Morals, 2nd edition, London: J. Payne, published 1756, Part I, p. 17

   1 more example

   1668, John Denham, Preface to the translation of two poems, in Poems and Translations, 6th edition, London: Jacob Tonson, 1719, p. 89, […] for I love not to improve the Honour of the Living, by impairing that of the Dead; and my own Profession hath taught me, not to erect new Superstructions upon an old Ruin.