The largest sundial is in the Piazza del Popolo (Italy), with a gnomon height of 48.43 m (158.89 ft) and a base diameter of 68.82 m (225.78 ft), in San Giovanni, Persicetoin, Bologna, Italy, as verified on 8 October 2022.

This record is for the largest sundial. This record is to be attempted by an individual or team of unlimited size. This record is measured in metres (m) to the nearest 0.01 m, with the equivalent imperial measurement given in feet (ft) and inches (in).

2019年6月6日 · The Jantar Mantar in Jaipur is one of the most sophisticated ancient astronomical observatories, hosting the largest sundial in the world. The observatory was probably completed around 1738. There are 20 instruments in the observatory which are built primarily of stone and marble, while mortar, bricks, and bronze tablets had also been used.

2021年10月14日 · The biggest sundial in the world is located inside the church of San Petronio in Piazza Maggiore, Bologna. Piazza Maggiore is in the center of Bologna and is dominated by the massive unfinished Basilica of San Petronio.

2022年8月31日 · When completed, Zaragoza's sundial became the largest in the world. It claimed the title from the previous record holder, the Jantar Mantar , in Jaipur, India, which was created around 1730 and...

2022年12月8日 · One of the sources of fascination with this sundial goes back to the original claim that it was the largest sundial in the world when it was commemorated in 1959.

The Carefree Arizona sundial was designed by architect Joe Wong and solar engineer John I. Yellott. It sits in the Sundial Circle plaza, and is the "third largest sundial in the Western Hemisphere" The sundial is said to point towards the North Star, but that may be a reference to the star-shaped sculpture hanging from the Gnomon.

2023年10月31日 · A testament to their scientific brilliance, the massive Samrat Yantra continues giving accurate time indications even today, over 270 years after its erection. It remains the largest working sundial ever constructed, a stellar example of practical mathematics from ancient India. Who Built the World’s Largest Sundial?

In the middle of the opening is a spherical nodus that casts its shadow into the concrete structure. According to the Guinness Book of Records in 1995, this is the world's largest sundial. Designed by Isozaki and calculated by Ross McCluney, the sundial is a large truncated, slanted cone, with hour markings on the inside.

2009年4月23日 · Though outdated in terms of its technological prowess, the stationary instruments at Jantar Mantar continually prove their relevancy in astronomical science, as well as currently holding the record for world's largest sundial, towering as they do at over 27 metres tall.