thumb|[[Würzburg Residence sculpture]]
thumb|right|Station of the cross, Würzburg
Johann Peter Alexander Wagner (c.26 February 1730 – 7 January 1809) was a German rococo sculptor.
Life
Wagner was born in Theres, Unterfranken, Bavaria, Germany and was initially trained by his father, Johann Thomas Wagner. In 1747 he took up studies in Vienna under several another Johann Wagner and Balthasar Ferdinand Moll. He then moved to Mannheim and worked under Paul or Augustin Egell. After a visit to France in 1756, he went to Würzburg to work under Johann Wolfgang van der Auwera, court sculptor to Adam Friedrich von Seinsheim, Prince–Bishop of Würzburg. Auwera died that same year and Wagner married the widow, Maria Cordula Curé. He also assumed the workshop of his master along with Johann Wolfgang's brother, Lukas von der Auwera.
He created several utilitant items over the next several years including a console table (1759), the altar to the Augustinerkirche, Würzburg (1760), the altar and baptismal font to the Stadtpfarrkirche of St Maria and St Regiswindis, Gerolzhofen, Schweinfurt. He collaborated with Lukas von der Auwera between 1763 and 1766 on the Vierröhren Fountain, Würzburg carving the figures. In 1766 he moved on to a purely aesthetic work depicting the Crucifixion for a church in Kürnach. He continued the trend composing 14 groups of figures for the Wallfahrtskirche Mariae Heimsuchung between 1767 and 1775; the Stations of the Cross begun by Lukas von der Auwera.