Runtingerhaus, Medieval merchant house in Regensburg, Germany.

The Runtinger House is a medieval merchant residence with three stories, a steep gabled roof, and Gothic windows facing Keplerstrasse in central Regensburg. The structure displays typical urban and residential architecture of the medieval period with stone walls and a distinctive facade.

Construction began around 1200 with a residential tower; the early Gothic stepped gable dates from the mid-13th century, and a four-storey house was added to the west in 1260. Around 1330 the building was extended south with a courtyard draw-well, and in 1367 the iron merchant Marquart Eisenmanger sold it to Wilhelm Runtinger. The Runtinger family, among Regensburg's wealthiest merchants, owned it until the 16th century; Wilhelm's 1399 purchase of the western plot gave the house its present extent.

The house takes its name from the Runtinger merchant family, who owned it from 1367 until the 16th century. The city archive kept here holds the family's trade ledger with entries from 1383 to 1407, considered the most important German merchant's book of the Middle Ages. The 200 m² historic hall on the first floor can be rented for events.

The building now houses the Regensburg city archive, so access is tied to archive business rather than general sightseeing. The 200 m² historic hall on the first floor can be rented for events and exhibitions. The courtyard entrance is covered by three cross-ribbed vaults, and a draw well stands in the inner courtyard.

The city archive here keeps the Runtinger family's account book, with entries from 1383 to 1407; it is considered the most important German merchant ledger of the Middle Ages. The 200 m² historic hall on the first floor, roofed by a massive wooden ceiling on an octagonal central pillar, can be rented for events.