Provision shall be made by law for the establishment of a state university at or near the seat of state government, and for connecting with the same, from time to time, such colleges in different parts of the state as the interests of education may require. The proceeds of all lands that have been or may hereafter be granted by the United States to the state for the support of a university shall be and remain a perpetual fund to be called “the university fund,” the interest of which shall be appropriated to the support of the state university, and no sectarian instruction shall be allowed in such university.