One of the jewels of the Aldstadt (Old City) of Innsbruck, Austria, is the city's cathedral, the Jakobsdom (the Cathedral of St. Jakob). It was built from 1717 to 1724, but only more recently was it designated as the cathedral church of Innsbruck.

 Like many of the older buildings in Innsbruck, the cathedral is built of a Quaternary breccia (shown below - note lens cap at top for scale). The breccia comes from the slopes above Hötting, a town just across the Inn and on the flanks of the northern or calcareous (limestone) Alps. The breccia appears to be a landslide deposit that accumulated during Quaternary glaciation of the Alps. As glaciers temporarily retreated from the Inn Valley, collapses of the steep valley walls dumped masses of limestone chunks onto the sloping sides of the valley. Those masses of limestone debris solidified to make breccias like the one at Hötting. Because the breccia consists of limestone clasts and a muddy matrix, it is easy enough to cut that it can be readily used as building stone. The coarse limestone chunks make the stone visually interesting as well.