type C also works with socket type E. Plug type F will also work with socket type E, but only if it has an additional pinhole.
Please note that a visa may be required to enter the territory of Poland. We advise you to find out if you need a visa as early as possible. Simlarly, if it occurs that you need it, apply for it as soon as possible. Please also note that conference organisers are not acting as a visa agent. However, we can provide you with a visa invitation letter after your registration process is complete and payment is received.