Measure up from the floor to the height you want the top edge of the tapestry and mark the wall with a pencil.
Align a 4-foot level horizontally at the mark and trace its edge on the wall with a pencil. Extend the line across the wall to the full width of the tapestry.
Find the studs in the wall along the level line. Tapping across the wall with a hammer will help you find them. Soft thud sounds show where the empty spaces inside the wall are, and harder, solid sounds are produced when you strike a stud.
Measure along a 1-by-2 or 1-by-4 board to the width of the tapestry, less 1/2 inch. Mark the length measurement on the board with a pencil and cut it at the mark with a circular saw or hand saw.
Sand the rough edges of the board with medium-grit sandpaper.
Align the upper edge of the board with the level pencil line. Transfer the stud location marks from the wall onto the board and remove the board.
Drill pilot holes through the board at each stud mark. Choose a drill bit that is the same diameter or slightly smaller than the screw shank, which is the center post of the screw.
Set the board back into position on the wall. Drive screws through the pilot holes and into the wall studs using a power drill with a Phillips screwdriver bit.
Spread out the tapestry face down on a clean work surface. Measure along a length of hook-and-loop closure tape to the width of the tapestry, less 1/2 inch. Mark it with a pencil, and cut through both layers of the tape with scissors.
Pull apart the two halves of the tape. Align the upper edge of the adhesive side of one half of the tape with the upper edge of the board and press it against the board.
Staple the tape to the board using a staple gun and heavy-duty staples, spacing them approximately 1 inch apart. Insert as many staples as needed to fasten the tape along all four edges and across the center.
Lay the adhesive side of other half of the tape, approximately 1/16 inch below the upper edge of the tapestry. Press the tape against the fabric.
Thread a needle and knot the end of the thread. Slip the tip of the needle through the tapestry backing only, not through to the decorative side, and pull the needle up until the knot stops the thread. Sew all four edges of the tape to the tapestry and sew another row of stitches across the center. Use small, tight stitches, but neatness is not imperative.
Press the tape on the back of the tapestry against the tape fastened to the board on the wall.