Close-up look at logo in Tower corner.
Glass windows are slowly becoming seamless.
Wistar DNA logo now prominent at the top-right corner of the Robert and Penny Fox Tower.
It may be overcast skies on Halloween day, but all is running smoothly on Wistar's Tower construction.
Close-up look at the Tower.
Where the CRB and the new research tower meet.
New windows are added along the second floor CRB.
Wide-angle photo of the work done to the CRB.
Ground floor contruction moves along with the addition of glass windows and the beginnings of a curving wall.
See work done blending the CRB's facade with the research tower.
A look at the rectangular glass windows of the CRB.
Looking up at the Tower where glass paneling stretches seamlessly across the facade except for along the elevator's path.
Top floor of the Robert and Penny Fox Tower visually comes together.
Despite construction,The Wistar Institute gleams in the midday sun.
Wistar construction on the Robert and Penny Fox Tower moves forward on a sunny fall day in late September.
A view of work being done at the top as the elevator makes its' way up to drop needed workers and supplies.
Work on the top two floors of the research tower progresses.
View of the Robert and Penny Fox Tower and the four new floors that connect to Wistar's 1894 building.
A close-up look at work being done on the ground and first floors.
Construction has food truck regulars taking notice of the research tower's progress.
View of Robert and Penny Fox Tower from Spruce St and 36th St walkway.
Close-up view of the top floors of the Tower.
This view of the building's progress is an exciting precursor of what's to come.
Though skies may be overcast, clouds reflecting on the research building brighten up the construction site.
View from the CRB shows work moving forward on exterior paneling of research tower.
Construction forges ahead during the lunchtime rush.
Clouds reflect in the clear and opaque glass panels that have been carefully installed throughout the month.
A look up Spruce St. at the construction taking place, from top to bottom, at Wistar.
The crane carefully maneuvers the panel into its slot in top-left corner of research tower.
Final panels are fit into place on this overcast Friday morning!
Wistar has come along way...check out the glass paneling stretching across almost the entire facade!
Glass paneling takes over the facade except for the elevator's path.
construction elevator transports workers and materials up to the tower's pinnacle.
A head-on view of the Robert and Penny Fox Tower.
Newbie Penn students got their first look at Wistar's research tower on the first day moving into campus.
Construction moves steadily along on this breezy, sunny August day.
Opaque and clear glass panels start to cover the facade of the new Robert and Penny Fox Tower and are a welcome sign of progress
Street-level view of Wistar from 36th and Walnut Sts.
In the shadow between the Robert and Penny Fox Tower and Wistar's 1894 Building is the bridge connecting the two buildings.
Another look at the clear and opaque glass paneling as construction progresses.
Construction elevator heads to the top floor of the new Robert and Penny Fox Tower.
Vertical view of the construction elevator moving up the Tower's skeleton
A look at the top levels of the Robert and Penny Fox Tower.
Street-level view of construction on Wistar research tower.
View of The Wistar Institute with focus on the Cancer Research Building
A head-on look at the completion, thus far, of the glass panels.
The glass paneling will continue to be installed to cover the skeleton frame.
The skeleton tower slowly starts to merge with Wistar's 1894 Building and the Cancer Research Building
Construction forges ahead on a beautiful Monday afternoon
Progress at the top
The exterior "skin" of the tower comes together at the top floors first
Over the weekend, the crane was dismantled after one stage in the construction plan was completed
Elevator makes its way to the top ferrying people and supplies to the upper levels
Work progresses, even without the massive tower crane that has spend many months completing work at the top.
The first section of the crane, a piece of steel the length of a city bus, comes gently down to the street.
The first section of the crane arm comes is removed.
The hole created by the removal of the tower crane will be conveniently repurposed as an elevator shaft.
Workers take advantage of quiet Saturday morning in August to remove the tower crane.
How do you take down a very large crane? Find a bigger one? A 500 ton crane begins to take down the tower construction crane.
View of The Wistar Institute at Spruce and 36th Sts.
The Cancer Research Building (left) will break through to connect with the 1st, 2nd, 3rd, and 4th floors of the new Tower
Vertical view of The Wistar Institute from Spruce St., near 38th Street
View of The Wistar Institute from Spruce St., near 38th Street
Close-up view of the top of the Tower the day before the tower crane is removed
A wide-angle view of the zinc-coated panels, the glass panels and the facade at the top levels
Dark gray, zinc-coated metal panels stand up to the weather and are a nice design element
View of the Robert and Penny Fox Tower facade
Glass paneling on the new tower extends down between the original building
Tower crane extends fully over the original, 1894 building
A closer look at the design of the clear and opaque glass panels
Clear and opaque glass panels begin transforming the skeleton tower
Tower crane busy maneuvering glass panels in place at the top.
The elevator makes its way to the top to where work to install glass panel windows continues.
This photo, taken through a window, captures the view of looking out onto Spruce Street from the Robert and Penny Fox Tower.
A lot of activity in the courtyard.
Workers install special bolts to add additional stability to the surrounding foundational structures.
The blue skies smile on the project in a view from Spruce Street.
The ramp gets smaller and smaller as the work space increases.
The crane that will power much of the coming building construction requires its own concrete foundation.
A full view of the construction zone on a pleasant November afternoon.
Months ago, worker dug trenches under the 1894 Building to prepare for the concrete foundations seen here.
Wall forms are erected and supplied with rebar in preparation for the concrete foundation walls.
After the wall forms are built, a massive crane arm delivers the concrete.
Foundation supports are created at the edge of the existing Cancer Research Building.
Looking closely at the center of this image, you can see a new pit readying to receive concrete.
Along the reinforcing wall parallel with Spruce St., diggers dig deeper. In the center, the previous pit is filled.
Below the restraining wall, you can see the natural rock in the wall below street level.
In this view, it's becoming clearer that the new foundational borders are taking shape.
Working at dawn, workers reach for the next piece. This massive crane, affixed to a concrete slab, will oversee construction.
The massive tower crane parts travel down Spruce Street in the early morning.
Crane pieces await their turn on Spruce Street.
A smaller crane lifts pieces to create the large tower crane.
The assembly cranes.
The "arms" of the tower crane are attached to the main vertical element.
Workers reach out to join the pieces.
Having secured themselves (safety first!), workers along the crane arm secure all of the pieces.
A view of the crane with the banner showing the future Robert and Penny Fox Tower.
It's full daylight, and the crane is up and ready for action!
The crane rises stories above the 1894 Building. Watch this space!
Before the steel beams can arrive, the concrete slab must be prepared (yellow area is a vapor barrier).
The concrete arrives via a tube from above, and workers quickly spread and smooth the concrete into the defined space.
The concrete for the slab has been poured. The diamond-shaped areas where the steel columns will be have been left open.
The slab is leveled and a hard finish to the concrete is made using the automated troweling machines.
Next, new, smaller concrete housekeeping pads are created on top to provide extra stability for mechanical equipment.
The chiller equipment, here covered with blue tarps, are lowered into the space using the crane.
Dr. Kaufman is on-site as the first steel column (suspended from the crane hook behind him) arrives.
Members of the executive staff are also on hand at this milestone for the future Robert and Penny Fox Tower.
This view of the excavation from Spruce Street shows bustling activity as the team prepares for the steel’s arrival.
A steel column is lowered horizontally into the construction area.
Workers help to guide the steel as the crane lifts it from the flatbed delivery truck.
The first steel column is carefully positioned into its pre-defined location on the concrete slab.
Workers confer at the edge of the job site. All is going smoothly so far!
Workers are keeping a close eye (and hand!) on the steel column as it is moved vertically.
Moving these enormous pieces requires careful control and collaboration of the workers on the ground and operating the crane.
Meanwhile, work continues. Here, a worker is harnessed safely for his trek along the edge of the new foundation wall.
This team is guiding the first steel column into its proper slot in the foundation.
The first columns are in place!
The cross pieces, which will help create future walls and floors, have been added.
The steel elements that will help to further define the specialized shapes of the new tower are placed.
With the addition of more steel, the progress begins to seem very rapid.
Within a days of the first steel placement, this multi-story array has risen.
The skeleton is complete, next workers will finish out the floors!
Now that the steel is all in place, the construction elevator has arrived.
Pumping concrete way, way up to the top to finish off the upper floors.
The construction elevator helps ferry workers and materials to place now that only the top floor is reachable by crane.
Sunny spring days are great for trying out different types of glass for the tower.
Overcast day at The Wistar Institute.
Crane guides glass panels into position at the top of the new Robert and Penny Fox Tower
With glass panels coming into position, the look of the Robert and Penny Fox Tower starts to come to fruition.
Another look at work being done at the top.
Construction on the Robert and Penny Fox Tower moves forward in what seems the blink of the eye.
A close-up look at the connecting of the Cancer Research Building and the Robert and Penny Fox Tower.
A wide-angle view of the construction work to join the Cancer Research Building and the new Robert and Penny Fox Tower.
Construction starts to seamlessly adjoin the Robert and Penny Fox Tower with the original building, constructed in 1894.
This vantage point gives a unique view of the adjoining Tower and original building.
A view below ground shows basement construction underway as well.
A side view of the many levels of work.
Supplying concrete to the new foundation support for the 1894 Buliding.
Still preparing the foundations of the 1894 Building for additional support.
A calm moment.
Notice the pulley and bucket. A big job requires both simple machines and complex machines.
To ensure stability for the sidewalk and the construction area, a reinforcing wall is built.
The original 1894 Building will get some reinforcement below its foundation, requiring digging deep by hand.
Powerful machinery pulverizes the remaining structural supports of the old vivarium.
Workers create an ad hoc wood cutting workshop on-site.
Digging deep, and getting a little wet.
Digging in progress!
Revealing a layer below the soil and rubble.
Now that the courtyard is cleared, work is underway to prepare for tower construction.
The view from Spruce Street.
During demolition, the rubble pile grew to the height of a few stories.
Today, the vivarium is gone. Workers sort through the rubble for steel and haul away the debris.
The cruncher takes a bite of the former vivarium roof.