[1] Warwick is situated south west of Brisbane on the Condamine River in the southern Darling Downs, and borders on fertile farmlands and the rolling hills of the Great Dividing Range.

[1] The township was proclaimed a municipality in 1861, and the 1860s saw substantial wheat growing in the district, a Cobb and Co. coach service introduced and the expansion of sheep breeding studs.

[1] Warwick Post Office is located on a prominent corner site to Grafton and Palmerin Street, which is the city's main thoroughfare and shopping precinct.

The postal hall was treated compositionally as an angled space "flowing" between the more confined areas of the entrance lobby, service rooms and verandah.

The arches, each elliptical in the manner of contemporary railway tunnels, are set, compositionally, in a grid that appears to have been pressed back closer against the roof parapet and other parts of the main façade.

Their railings bulge upward in the middle, in an accentuation of Baroque line or the "jumping cornice" often seen in window framing or clock tower mouldings of this period.

[1] Each of the arches has accentuated keystones and their 90 degree side voussoirs also project, resembling the four quadrant-voussoired bullseyes seen on the Ipswich Post Office two years later.

The dome drum is an elongated structure, sited well clear of the roof parapet line, and its surface is decorated with a set of eight swags, thus ensuring its prominence when viewed from the street level below.

The unused doors to the centre of the Palmerin Street elevation have a similar toplight form and the framing of the adjacent windows has been altered to a "moderne" profile.

The original cast iron columns and v-jointed painted timber ceiling is visible within the space and modern suspended pendant lighting has been installed.

This was followed by a series of internal fitouts through the whole complex, culminating in the conversion of the public area to the standard Australia Post retail format in the 1990s.

[1] Criterion A: Processes Warwick Post Office, constructed in 1898, is located on a prominent corner site within a centre renowned for its substantial buildings made from the abundant local sandstone.

The post office's use of a hollowed out "envelope" in its external sun protection is also a creative development of JJ Clark's use of it on the Old Brisbane Treasury.

[1] Criterion E: Aesthetic characteristics Warwick Post Office has a high level of aesthetic significance deriving from its rusticated sandstone treatment and prominent corner siting, emphasised by the elongated decorated dome drum over the (chamfered) corner entrance pavilion, and the arcaded verandahs (loggias) with distinctive elliptical horseshoe arches.

The rusticated sandstone treatment is of merit, as is the skilful and elegant application of Tuscan and Ionic columns and pilasters, scroll consoles, swag decoration, and the accentuated keystones and side voussoirs to the elliptical horseshoe arches.

[1] This Wikipedia article was originally based on Warwick Post Office, entry number 105537 in the Australian Heritage Database published by the Commonwealth of Australia 2018 under CC-BY 4.0 licence, accessed on 1 October 2018.