Here is an interesting video short on Roman dice towers.
Roman dice towers—known in antiquity as the pyrgus or turricula—were gaming devices designed to ensure fair, random dice rolls.
A dice tower was a small vertical structure with internal ramps. A player dropped dice in the top; they tumbled through the interior and emerged at the bottom in a randomized roll. This prevented sleight‑of‑hand, loaded throws, or palming—complaints that appear in Roman literature as early as the 1st century AD.
Pictured above: The Vettweiss‑Froitzheim dice tower is a 4th‑century copper‑alloy Roman gaming tower about 22.5 cm tall, discovered in 1983 in a villa near Vettweiss in Germany, notable for its internal stepped ramps that tumbled dice onto three tiny bells, its openwork dolphin and geometric decoration, and its striking military inscription—PICTOS VICTOS / HOSTIS DELETA / LUDITE SECURI (“The Picts conquered, the enemy destroyed—play in safety”)—which strongly suggests it belonged to a Roman soldier on the northern frontier and served both as an anti‑cheating device and a piece of triumphal propaganda.
https://www.classroomadventures.co.uk/post/the-roman-dice-tower