The act provided in detail rules for building within the fire limits, and regulations appertaining to building in general. Thus it was provided that "no timber shall be used in the front or rear walls of any dwelling, store, or storehouse, or other building hereafter built or erected within the Western District of said city, where stone, brick, or iron is commonly used; each lintel on the inside of the front or rear wall or side walls shall have a secure brick arch over it, and no wall strips in any wall thereof shall exceed in thickness one half of one inch, and in width two and one half inches; and no bond timber in any wall thereof shall in width and thickness exceed the width and thickness of a course of brick; and no bond timber shall be more than six feet in length; and such bond timbers shall be laid at least eighteen inches apart from each other, longitudinally, on either side of any wall, and the continuous line thereof shall be broken every six feet by inserting a brick of eight inches; and no front, rear, or other wall of any such dwelling, store, storehouse, or other building now erected, or hereafter to be erected, as aforesaid, within the fire limits, or as they may hereafter be extended as aforesaid, or any brick or stone building or buildings in the Western District of the city of Brooklyn, shall be cut off or altered below, to be supported in any manner, in whole or in part, by wood, but shall be wholly supported by brick, stone, or iron; and no wood or timber shall be used between such wall and such supporters; but it shall be lawful to insert a lintel of wood over the doors and windows of the first story of stores, of oak or Georgia pine, of such length and size as shall be first approved and determined by the superintendent of buildings." An important movement, begun before the war, culminating in 1860, and bearing fruit soon after the close of the war, resulted in the establishment of one of Brooklyn's chief objects of pride,--Prospect Park. The actual construction of the park began in 1866, and was steadily continued until 1874. The laying out and adornment of the park was placed in the hands of a commission, of which J. S. T. Stranahan, always a leading figure in the park movement, was the president. This commission, originally constituted under an act of the Legislature for the laying out, adornment, and management of the park, had its powers and duties increased by succeeding laws, until it had under its control Washington Park, City Park, Carroll Park, the Parade Ground, and all the public grounds appertaining to the city.