The Arco de Santa Catalina, an arch spanning 5a Avenida Norte, is the most-photographed structure in Antigua — the classic composition sets it against the backdrop of Volcán de Agua, the perfect cone framed in the arch. The arch itself dates from the 17th century and was built to connect the Convent of Santa Catalina with the temple across the street, allowing the cloistered nuns to pass without exposing themselves to the street.
The yellow arch with its prominent clock stands at the north end of the most attractive stretch of colonial Antigua, and the view through it to the south — down the cobblestone street, framed by colonial facades and terminated by the volcano — is irresistible. Most photographers shoot it early in the morning before the tour groups arrive. The street below is pedestrianised and busy with market stalls and tourists from mid-morning onwards.