Portuguese calçada — the hand-laid limestone cobblestone mosaic — arrived in Senado Square in the early 1990s when the city pedestrianized the zone and covered the old tarmac. The wave pattern underfoot is not merely decorative; it is the same tradition that produces the famous pavement of Lisbon's Rossio square and the seafront in Copacabana, a craft carried by Portuguese stonemasons to every corner of their empire. Before the calçada came, the square accommodated traffic and parking lots. The transformation into a pedestrian-only zone reoriented the space toward the people who actually live and visit here. At night, with the yellow-and-white facades of the surrounding buildings lit warm against the dark sky, the effect is theatrical — a stage set that happens to be a real place, used daily by residents buying groceries, teenagers taking photographs, and older men reading newspapers on stone benches.

In 1940, the Portuguese placed a bronze statue at the center of the square: Vicente Nicolau de Mesquita, military hero, standing atop a stone pillar with his sword drawn. Mesquita was celebrated in Portuguese colonial memory for his role in a nineteenth-century battle against Qing Chinese soldiers near the Barrier Gate. The Cantonese remembered that engagement differently. When the 12-3 incident erupted in December 1966 — a violent confrontation between Macau's Chinese community and the colonial government, sparked by construction disputes but fueled by decades of resentment — the statue became a target. Protesters pulled it down. In its place, the Portuguese built a fountain, which still stands there today. The empty plinth, then the fountain, marked a negotiated accommodation: the square would be shared space, not exclusively Portuguese commemorative ground. The building that gave the square its name, the Leal Senado — the Loyal Senate — stood directly across, its loyalty to the Portuguese crown now a historical footnote in a Chinese special administrative region.

Hong Kong cinema discovered Senado Square in the 1950s and 1960s, when the territory's film industry was producing dozens of Cantonese-language films each year and location shooting in nearby Macau provided a distinctive backdrop — European in character but accessible, and willing to accommodate a film crew. Several productions of that era include scenes shot on or around the square, giving the cobblestones a minor cinematic history that most tourists never know about. The square's photogenic quality — those curving facades, that undulating pavement, the colonial clock tower of the General Post Office — translates as well to a film frame as it does to a banknote. Whatever the medium, the image tends to read as something that could exist nowhere else.

The square connects Largo do São Domingos at its northern end, where St. Dominic's Church stands in yellow baroque splendor, to Avenida de Almeida Ribeiro at its southern end, the main commercial artery of old Macau. Walk the length of it and you pass the Holy House of Mercy on the east, the Leal Senado Building and its inner courtyard garden on the west, the Macau General Post Office presiding over a corner. These are not merely old buildings; they are still operating institutions. The post office still processes mail. The Leal Senado still houses government functions. The square still hosts festivals. Macau's World Heritage inscription in 2005 recognized the historic center as a living urban landscape, not a preserved ruin. Senado Square earns that description every day of the year.