Thanks for your questions about the Mace.
At the start of each sitting day in the House of Representatives, the Mace is carried into the House by the Serjeant-at-Arms where it is placed on the central table. The crown of the Mace always points to the government side of the House and the Australian Coat of Arms faces up. The Mace sits on the central table as long as the House is officially meeting and the Speaker or a deputy is present.
When not in use, the Mace is kept in a glass cabinet in the Speaker's office.
In medieval times, the royal Serjeants-at-Arms carried a mace stamped with the Royal Arms. This was a weapon used to assert the authority of the monarch. By 1415, the House of Commons in the British Parliament had appointed its own Serjeant-at-Arms to serve the members of the House. The tradition of the Mace in the House of Representatives is taken from this practice in the House of Commons.