Mitte" campus. Unaffected by this decision is Brugg's fusion with Umiken. The town council (Stadtrat ) ordered a study on a possible merger, the results of which were presented in March 2007 and were positively received. The resident's council (Einwohnerrat ) approved the merger agreement on July 27, 2008. A referendum in favor passed on September 28, 2008, in both Brugg – with 88.6 voting "yes" (1,748 to 224) – and Umiken – with 85.7 percent voting yes (330 to 55). The merger was scheduled to occur on January 1, 2010. Points of interest Heritage sites of national significance The Schlössli Altenburg (a late-Roman and medieval castle), the former Lateinschule, the Swiss Reformed City Church, the Schwarzer Turm (Black tower), the Vindonissa-Museum, and Zimmermannhaus (Carpenter House) are listed as Swiss heritage sites of national significance. The Old Town Brugg's old town developed along a narrow gorge of the Aare and is divided into two parts – one on each bank. The section on the southern bank is by far the largest. Shaped like a bell, it is located on a sloping hillside. The smaller periphery on the northern bank is located at the foot of the Bruggerberg. Almost all of the old town's buildings are constructed from shell limestone. Only portions of the town's defensive structures remain in existence. Different fragments have been integrated into the town's modern structures and have been broken through with windows and passageways in many sections. Of the town's towers only the Archivturm (Archive Tower) and the lower half of the Storchenturm (Stork Tower) on the western side along with the Eckturm (Corner Tower) on the northern side of the town's north-bank periphery remain. The town's oldest building and landmark, the Schwarze Turm (Black Tower), is a 25.7-meter high tower-castle. This bridgehead is partially constructed from remains of the Roman Legion post Vindonissa and was expanded several meters higher in 1535. The town's late-gothic town hall (Rathaus) was added onto it in 1579. The tower was used as the regions prison from 1846 until November 2006. Brugg's reformed church is the seat of the regional church district. The oldest remaining section, a tower integrated into the town's former defenses, was completed around 1220. Between 1479 and 1518, the building was expanded in four stages in late-gothic style with three naves, a side chapel, and a choir. The interior layout originates from 1641 to 1642. Its