Phra Prathon Chedi is a large Dvaravati-era Buddhist stupa in the eastern part of Nakhon Pathom town, standing 50 metres high and considerably older than the famous Phra Pathom Chedi a few kilometres to the west. The structure has been restored and rebuilt many times over the centuries, but its core dates to the first millennium CE, making it among the earliest Buddhist monuments in mainland Southeast Asia.
The surrounding temple complex, Wat Phra Prathon Chedi, is an active place of worship with a resident monastic community. The grounds are quieter and less visited than those of the Phra Pathom Chedi, which gives the site a more contemplative character. The main stupa is encircled by a gallery of Buddha images, and the museum on site contains Dvaravati-period artefacts excavated from the area. Worth combining with the more famous chedi if you have a full day in Nakhon Pathom.