Kauzenburg (castle) destroyed in the 17th century; expansion in 1971 by Gottfried Böhm; preserved from the sovereign area (Burgfrieden): stepped wall as far as foundation of Klappertorturm (tower), piece of wall with later added half-round tower as far as Stumpfer Turm ("Stub Tower", also called Pfeffermühlchen, or "Little Peppermill") as well as the wall that partly forms the Nahe's bank, today partly overbuilt; preserved from the ringwall around the New Town with formerly seven towers and three gates: Butterfass ("Butterchurn") and piece of wall with battlement walkway, foundation remnants of the Winzenheimer Turm (tower), piece of wall of the Schanz ("Redoubt") with ditch, further remnants of the fortifications in the houses built up against them in the 19th century, a watergate (Fischerpforte, meaning "Fishermen's Gate") as well as the Große Pforte ("Great Gate", today walled up); preserved from the Old Town fortifications with formerly 13 towers, three gates and Peterspförtchen ("Peter's Little Gate"): wall remnants along the millpond, twin watergates (near Wilhelmstraße) and jutting part of the powder tower, at the Mehlwaage ("Flour Scales", but actually a house) an archlike structure built on as well as a great bit of wall in the garden of the former Franciscan monastery (now a Gymnasium) Agricolastraße 1 – lordly villa with hip roof, 1925/1926, architect Alexander Ackermann Agricolastraße 6 – sophisticated cube-shaped villa with hip roof, Art Deco, 1925/1926, architect Alexander Ackermann Agricolastraße 7 – villalike building with hip roof, 1921/22, architect Vorbius Albrechtstraße 18 – one-floor villa with timber-frame gables, Renaissance Revival motifs, 1904/1905, architect Friedrich Metzger Albrechtstraße 20 – villa with hipped mansard roof, Renaissance Revival and Baroque Revival motifs, 1901/1902, architect Friedrich Metzger Albrechtstraße 22 – villalike house with mansard roof, Renaissance Revival and Baroque Revival motifs, 1902/1903, architect Friedrich Metzger Alte Poststraße 2 – three-floor post-Baroque shophouse, partly timber-frame (plastered), possibly from the earlier half of the 19th century At Alte Poststraße 4 – cartouche, marked 1797 Alte Poststraße 6 – corner house; Late Baroque house with (hipped) mansard roof; Baroquified window 1909, architect Anton Kullmann; cellar older Alte Poststraße 7 – Late Baroque house, partly timber-frame (plastered), conversion 1839, architect Peter Engelmann; cellar possibly older Alte Poststraße 8 – Late Baroque house, partly timber-frame (plastered or slated) Alte Poststraße 15 – former Volxheimer Burghaus; gabled house, ground floor from the 16th century, upper floor and gables in decorative timber framing about 1710 Alzeyer Straße – barracks symmetrically about