Section 73. Cities and villages may hold property in trust for certain purposes

Real and personal estate may be granted and  conveyed  to  the  corporation  of  any  city or village of this state, to be held in trust
  for any purpose of education, or the diffusion of knowledge, or for  the
  relief  of distress; or for parks, gardens, or other ornamental grounds,
  or grounds for the purposes of military parades and exercise, or  health
  and  recreation,  within or near such incorporated city or village, upon
  such conditions as may be prescribed by the grantor or donor, and agreed
  to by such corporation; and all real estate so granted  or  conveyed  to
  such corporation, may be held by the same, subject to such conditions as
  may be prescribed and agreed to as aforesaid.