Book  (19 Apr 2000)  Page(s) 532.  
 
'Schloss Friedenstein' 1915 mauve Hybrid Multiflora I.C. Schmidt.

Book  (1936)  Page(s) 281.  
 
Friedenstein, Schloss (Multiflora) J.C. Schmidt 1915; Veilchenblau X M.N. Levavasseur; deep blue, center reddish violet, 3cm., double, large clusters, fragrance 4/10 (violet), few thorns, glossy dark green foliage, lasting, growth 8/10, climbing, 2-3m. Sangerhausen

Website/Catalog  (1934)  Page(s) 93.  
 
Ramblers (Climbers)...Schloss Friedenstein. The best blue climber commercialized to date. The blooms appear in large panicles, reddish-violet (10 ne/10 pg) on white base, very peculiar colouring. Vigorous habit, the canes are almost without prickles.. ...Low garden plants 1 piece RM [Reichsmark] -.70  10 pieces RM 6.50

Book  (1933)  Page(s) 212.  
 
SCHLOSS FRIEDENSTEIN. J. C. Schmidt, 1917. Generally considered the bluest and least objectionable of the descendants of Veilchenblau. It bears clusters of medium, dark blue flowers tinged with violet.

Book  (1930)  Page(s) 397.  
 
Schloss Friedenstein. (J. C. Schmidt 1915.) Double, quite dark blue, in large clusters. Very vigorous.

Magazine  (Jun 1929)  Page(s) 72.  
 
Schloss Friedenstein (J.-C. Schmidt, 1915), fleur grande, pleine, bleu foncé à centre violet rougeâtre.

Website/Catalog  (1926)  Page(s) 25.  
 
Ramblers. Schloss Friedenstein (J. C. Schmidt 1915). Vigorous, healthy dark green foliage. Large blooms for the type, very fine form, double, beautiful purple-lilac.

Website/Catalog  (1925)  Page(s) 85.  
 
Ramblers (Climbers)...Schloss Friedenstein. The best blue climber commercialized to date. The blooms appear in large panicles, the individual blooms are large and double. The colour is quite dark blue, the inside of the blooms reddish violet, very peculiar colour. Vigorous habit, the canes are almost without prickles. Dark green foliage. ...Low-grafted garden plants 1 piece G.-M. [Gold-Mark] 1.25  10 pieces G.-M. 11.-

Book  (1920)  Page(s) 7.  
 
Schloss Friedenstein, dark blue with a little violet in the center