With total height of 310 cm (10'4"), the basic idea for this design is to create a tree shapes using metal plates and adding a circular light to implements a 'halo'--which could also be triggered by sensor, so it glows brighter when someone come closer.

To make it feel more organic, another thing I propose is to put some vines or potted plantation at the back side of the tomb, using the space between the tree-trunk plates.

At the bottom pedestal, there are also spaces to put candles and flowers, or even water element if necessary.

The top part, below the solar panel, I create a tilt & swivel mechanism, to make the orientation of solar panel become adjustable.