"The garden before the palace is small but pleasant. It contains over 4,000 bitter orange, laurel, lemon and similar trees, including 2,700 orange trees … In several depressions in the garden, pleasant free lanes of small lemon trees have been planted, in addition to a birdhouse for 300 canaries, which flew around in the garden in the summer and voluntary returned to their home again."
Johann Georg Keyßler in "Neueste Reisen durch Deutschland, Böhmen, Ungarn, die Schweiz, Italien und Lothringen". Hanover, 1740/41. Letter of 18 September 1729.
On both sides of the entrance of the residential palace, Margrave Karl Wilhelm of Baden-Durlach had inscriptions applied in German and Latin with the following content:
"In the year 1715 I was a forest in which wild animals lived. A lover of peace and quiet wanted to while away the time in silence here, while considering creation, despising vanity and justly honoring the Creator. Alone the people also came and built what you see here. So there is no greater peace and quite as long as the sun shines but alone that which can be found in God, which you, if you only want to, can also enjoy in the midst of the world. In the year 1728." As early as 1715 the Margrave wished for a residential palace in which he could find peace and seclusion. And this resulted in the name of the city, which was originally "Carols Ruh" (Carol's Peace).