Climb on the first low glass case and turn left. Jump to grab the archaeological relic and pull up. Pick up the Large Health Pack and turn right.

Take a running jump over the lasers to land on the next case. Then jump to the one on your right and turn left.

To reach the next case, take a running jump when the moving lasers are at the lowest point.

Once you make it, walk to the other edge of the case and take a standing jump when the upper two laser beams turn off.

Now hang from the right hand side of the glass case and shimmy to the right, passing beneath the lasers.

Either pull up or keep shimming until the ground is clear and drop down.

Climb on the right hand case and jump through the gap to pass the crossed lasers.

If, for some reason, you keep activating the alarm here, grab the sill above, shimmy to the left and drop down. Open the door and exit the gallery.