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Address and phone numbers

Mailing address:

P.O. Box 9512
2300 RA Leiden
The Netherlands

Street address:

Niels Bohrweg 1
2333 CA Leiden
Fax: +31-71-527-7101
Phone: +31-71-527-7111

Public transport

Take a train to Leiden CS ("Central Station") (20 minutes from Schiphol airport). You now have three possibilities:

On foot:
It is a 25 minute walk from the station along the "Wassenaarseweg". Here is a map.
By bus:
You take line 57 at the back of the station in the direction of Lisse (get off at the stop "Corpus"). The busses leave from the station every 30 minutes (until 7.30PM). The Mathematical Institute is in the nearest building, across the road from the bus stop.
By taxi:
Taxis are located in front of the station. The cost is about 12 euros.

By car

It is easiest to approach from the A44, the main road which runs parallel to the coast, just to the west of Leiden (make sure you take the A44, not the A4 which also connects Amsterdam, Leiden and The Hague, but runs along the other side of the city).