An existing ‘physical threshold’ aligned with Tower Rock (is strengthened with steel plate) and extends its upper ground plane into a generous arrival court creating ‘a visual threshold’ across the Palmerie withholding its extents until approaching an elevated canal (fed by sites ‘sweet water’ well) which seeps thru its taller southside creating a cooling downward breeze below Palmerie toward the indoor / outdoor rooms while stronger prevailing winds sail on above (water seep is turned off in colder months). A quicker ramp takes you downward to the auto / horse arrival to main house, while a slower ramp extends east to another existing road which separates main house from servant quarters. Palm Grid House is placed along long-north-edge of a south-facing Citrus Room which will continue as a grand outdoor majlis for Mandi cooking (slow-cooked-rice-meat-in-tiered-underground-pit) with fresh squeezed citrus for which Al Ula is famous. The plan of 2 x 34 Palm Grid Courtyard House is carefully designed within existing Palmerie Grid (7M x 7M) to preserve a high % of existing Palmerie for shade and nourishment. Walls are solid-stone (from an Ottoman load-bearing sandstone quarry nearby) with traditional wood beam / lattice / earth roof construction for nighttime occupation. Roof line is always just under or just above the Palmerie. Both ‘site’ and its proposed ‘inhabited garden’ is made of stone, sand, water, palm and citrus.