With the change of guard, Mukherjee, 81, hands over to Kovind, 71, a legacy of cultural and architectural preservation, which a heritage expert said was one of Mukherjee's abiding passions.
The centrepiece of the Raisina Hill capital complex, designed by British architect Sir Edwin Landseer Lutyens as the Viceroy's House, became the residence of the Head of State of the Republic of India in 1950.
Old and decrepit stables were converted into a museum, colonial-era clock towers were refurbished and a building of the President's Bodyguard (PBG) was restored.
"His vision of heritage was very holistic and did not just relate to piecemeal projects. He was very interested in and enthusiastic about every restoration project that was taking place or being planned," architect and former convener of conservation body INTACH's Delhi Chapter, AGK Menon, said.
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His vision "definitely enhanced" the architectural grandeur of Rashtrapati Bhavan, he said.
Delhi-based Indian National Trust for Cultural Heritage (INTACH) has collaborated with the President's Estate on many restoration projects, including a 1925-built clock tower that was inaugurated on July 25, 2015, on the completion of Mukherjee's three years in office.
The clock tower, built by Lutyens, is now the house reception zone of the Rashtrapati Bhavan Museum Complex, a cafeteria and a souvenir shop.
Phase-II of the museum, spread over 10,000 sqm, is a hi-tech story-telling centre that recounts facts about the planning and construction of the building.
While opening a restored building of the PBG earlier this month, the 13th President had said he would demit office "satisfied" with the success of his five-year initiative to restore heritage buildings in the Bhavan.
An elite household cavalry regiment of the Indian Army, the PBG is the oldest and finest regiment of the British era, active since 1773.
After restoration, the 1920-era PBG building gleams in its all-white glory as the clock tower atop it chimes in time with perfection.
Yesterday, in his last address to the nation as the president, he said, "We tried to build a humane and happy township", summing up his five years in the sprawling presidential residence.
Mukherjee, an avid reader, today moved to 10, Rajaji Marg, a Raj-era bungalow in Lutyens's Delhi, after bidding farewell to the grand Rashtrapati Bhavan, where he had assumed office on this day in 2012.
Lutyens, while designing the Viceroy's House, created a new order for the columns used in the building -- the Delhi Order. The pillars were embellished on top with bells and motifs of elephants, a running theme across the architectural landscape, from the grand fence and wrought-iron gates in the front to the main building premises.
Sitting atop Raisina Hill and completed in 1929, it is one of the most visited and photographed buildings in Delhi. It encompasses 1 1/2 miles of corridors, 340 rooms of which 63 are living rooms, 227 columns and 37 fountains, including roof fountains.
In the forecourt of the building is a monumental column -- The Jaipur Column. It is made of sandstone and carries a five-tonne bronze lotus from which emerges a six-pointed 'Star of India', made of glass. The star was installed in 1930.
The Jaipur Column has carvings that face the north and south. On the eastern side is a map of Delhi, as envisioned then, and an inscription that runs through three sides of the column.
After India became a Republic, the Viceroy's House was rechristened Rashtrapati Bhavan.