The Mediaeval Stone Building is an unidentified mediaeval ruin on Much Park Street, Coventry, in the West Midlands of England.

The ruin is a Grade II* listed building; it is believed to have been built in the late 13th or early 14th century and was uncovered by a German bomb during the Coventry Blitz.

The shell of the cellar remains—one of several similar cellars in Coventry city centre including those at 21–22 High Street, Coventry and 38–39 Bayley Lane—as do three of the four walls from the ground floor.

There is speculation that it may have been associated with the monastery at Whitefriars further along Much Park Street or an independent merchant's house.

The site of the building was excavated in 1971: archaeologists discovered pottery from the 13th and 14th centuries.