No details yet, but what we do know is that the pre-Civil War structure was reported burning this morning around 1:45 AM Central Time and that it apparently has suffered "extraordinary, bordering on catastrophic," damage.

An early morning, four-alarm fire caused extensive damage to the Governor's Mansion today. But no one was in the building, which has been closed several months for renovation.

Gov. Rick Perry and his wife, Anita, are in Stockholm, Sweden, finishing up a weeklong, trade-related trip to Europe.

Damage to the 150-year-old historic structure is "extraordinary, bordering on catastrophic," including a partially collapsed roof, said Perry spokesman Robert Black.

Security officers staying on the grounds in a carriage house discovered the fire, and when the first firefighters arrived about 1:45 a.m., the fire already had spread to the second floor and the ceiling.

About 100 firefighters responded; none were injured, Black said.

The state Fire Marshal's office has begun an investigation, he said.

The building is in the midst of a $10 million renovation project, which raises the question of whether the fire is somehow related to the work in progress.

And the irony of it all.

Ironically, one of the purposes of the renovation project was to install a sprinkler system in the building, which had none. Before work began, the mansion had a fire alarm system on the first floor but none on the second floor, where the governor and his family lived.

UPDATE: Eyewitness report from YouTube.

Also, let me respond to a private email about this sad event: No, I don't think that delegates to the Texas Democrat Convention in Austin this weekend burned the Governor's Mansion -- even though I agree with the assessment that they are unlikely to have a member of their party win that office anytime in the next decade.

UPDATE 2: Now they say it is arson. Maybe that emailer was on to something after all.

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