Complex sentence: French gardeners were hired by James IV at Stirling in 1501 and James V at Holyrood in 1536 and remains indicate sophisticated formal gardens there and at Falkland and Linlithgow, including the king's knot garden at Stirling.
Split into simpler sentences: French gardeners were hired by James IV at Stirling in 1501 and James V at Holyrood in 1536, where archaeological remains indicate there were sophisticated formal gardens. Similar landscaping is also found at Falkland and Linlithgow, including the king's knot garden at Stirling.