The room is already cluttered with mementos and framed photographs of his extraordinary run as owner of the New England Patriots.

There's the framed picture of Tom Brady in the Tuck Rule Game, personalized by former Raiders coach Jon Gruden with the inscription, "It was a fumble!" ("I'm going to auction that off," Kraft says). There are shots of Kraft with various dignitaries, including his friend, former President George H.W. Bush, who, Kraft says, plans to continue his birthday tradition of jumping out of an airplane when he turns 90 in June.

The most prominently displayed photographs are those of Kraft's four sons and his wife, Myra, who lost her battle with ovarian cancer in July 2011.

Her death left him disconsolate, lonely and dispirited. His sons, who were initially deeply concerned about their father, say while the sadness of losing his wife of 48 years lingers, the veil of grief is finally lifting. Kraft, who will turn 73 in June, gives no indication he has any immediate plans to retire.

"After the love of my family," said Kraft, "there's nothing more important to me than winning football games. And I will do whatever I have to do to put this team in position to do that."

Next week will mark the 20th anniversary of Kraft purchasing of the Patriots, providing an occasion to sort through two decades of memories that began when he paid James Orthwein $172 million for a franchise that had posted a dismal 19-61 mark (worst in the NFL) over the previous five years. At the time, the purchase price was the highest of any franchise in sports history.

Today, according to Forbes Magazine, the net worth of the Patriots is more than $1.8 billion, second in the NFL only to the Dallas Cowboys ($2.3 billion). Kraft has deftly molded the New England Patriots brand into an empire that includes the open-air shopping center Patriot Place, and he has done it with private funds.

He is one of the most powerful men in football, viewed as both a tender philanthropist and a ruthless businessman. In the past 20 years, he has been lauded as the man who saved the NFL and denigrated as the man who eviscerated the city of Hartford, Conn.

The success of his football team under his watch is indisputable. Since Kraft purchased the team in 1994, the Patriots have won more Super Bowls (3), more conference (6) and division (13) championships and more playoff games (33) than any other NFL team. Their sellout streak is at 216 and counting, with a lengthy waiting list of eager consumers raring to buy into the action.

While the team has reached dizzying heights, there have been some numbing lows, including the Spygate scandal and the incarceration of former Patriots tight end Aaron Hernandez on murder charges.

True to the "Patriot Way" of leaving the past in the past, the team has successfully scrubbed itself clean of any Hernandez remnants. The Patriots initiated a program in which anyone could turn in a No. 81 Hernandez jersey for a different team jersey for free. It was a clever public relations maneuver that cost the team almost $250,000.

Players have been ordered to refrain from speaking about their former teammate, who was one of Brady's favorite receiving targets.

The current Patriots roster, set to play the Denver Broncos for the AFC championship on Sunday, has earned its moniker as a plucky team that has defied odds as one significant player after another -- Vince Wilfork, Jerod Mayo, Rob Gronkowski, Tommy Kelly -- was lost for the season.

"This is a team with real mental toughness," Kraft noted. "I don't know what's going to happen, but it reminds me of our '01 group. We didn't have the best players, but there was a sense of togetherness that was special."

That team won the first Super Bowl in franchise history in surprising fashion. The 2013 team may or may not bookend that feat. So what has Kraft learned about the business in between?

The Patriots surprised the Rams to win Super Bowl XXXVI, one of three times Robert Kraft has hoisted the Lombardi trophy. Jeff Haynes/Getty Images

"I've learned not to be surprised when unexpected negative things come along," Kraft answered in a wide-ranging interview last week. "Everyone is there for the good times. It's how you handle the difficult times that will separate you.

"It's like keeping a family together. Let's be honest: This is a sick business. [The NFL] is going for parity. Your games get scheduled in terms of how well you did. You draft according to how well you did. You're punished for excellence, in a sense.

"You all have the same household budget you can spend, so you have to be wise. You have physical injuries that happen that are acts of God beyond anyone's ability to predict. You have to be very, very artful in how you design the team.

"It's like managing a business portfolio. And in the bottom third of that portfolio, the bottom third of your team, you need to be looking for specials that other people don't know about. Players like [defensive tackles] Chris Jones and Sealver Siliga.

"We've had a lot of those. Our football people have done a great job. But you can't rest. Once you think you've got it knocked, look out."

Kraft was blindsided by the charges levied against Hernandez, who, upon signing a five-year, $40 million extension in August 2012, kissed his team's owner, vowed to be a role model, then donated $50,000 of his new contract to the Myra H. Kraft Giving Back Fund.

"It's the saddest, most unfortunate part of our history with the team," Kraft said solemnly.

It is one of the lone blemishes on an otherwise brilliant success story in which Kraft transformed a football doormat into a juggernaut.

Resuscitating a franchise

Kraft had his sights on purchasing the Patriots as far back as 1985, when he bought an option on a parcel of land adjacent to the team's stadium. Three years later he bought the stadium out of bankruptcy for $25 million, which included the stadium's lease to the Patriots.