NEW YORK CITY — Don’t expect to stroll around the MoMA or see the American Museum of Natural History’s dinosaurs if New York City enters Phase Four reopening next week.

Mayor Bill de Blasio and Gov. Andrew Cuomo on Thursday successively slammed the door shut on chances many indoor spaces will reopen as the city steps away from complete coronavirus lockdown.

Cuomo is expected to make a final call on the reopening Friday. If he gives the go-ahead, New York City will join the rest of the state in Phase Four — which opens the door to schools returning, professional sports without fans, and low-risk outdoor entertainment.

But Mayor Bill de Blasio on Thursday cast doubt on places like museums reopening in New York City as they did elsewhere in the state.

“The indoor is causing me pause,” de Blasio said.

Cuomo later that day put the hammer completely down — New York City indoor cultural institutions and malls won’t open even if the city moves into Phase Four starting Monday, he said.

De Blasio drew a distinction between the safety between indoor and outdoor spaces, especially in light of rising coronavirus cases across the country.

He said he felt good about outdoor spaces like zoos and botanical gardens opening back up.

“The indoor is causing me pause,” he said. “The indoor should proceed only with tremendous caution and very strict rules.”

Cuomo is expected to make an announcement on Phase Four by Friday.