tropæum

from The Century Dictionary.

• noun See trophy, 1.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A monument erected (originally on the field of battle) by the prevailing army (without Senatical grant — contrast triumph) to commemorate victory in war, featuring spoils taken from the enemy (especially the personal arms of the vanquished general), and dedicated to an appropriate god (such as Mars).