President Michael D Higgins will address members of the Scottish Parliament later, as they attempt to keep their country in the European Union.
Scottish First Minister Nicola Sturgeon will speak to the European Parliament president Martin Schulz in Brussels, but it is thought she will not be granted a meeting with European Council chief Donald Tusk.
She is seeking cross-party backing from Members of Scottish Parliament (MSPs) to pursue talks aimed at protecting Scotland's place in the EU after 62% of Scots voted to remain in the bloc.
Speaking during an emergency debate at Holyrood, Ms Sturgeon said: "Scotland spoke clearly for Remain and I am determined that Scotland's voice will be heard."
She told the parliament she was not seeking endorsement for a second independence referendum at present.
Yesterday, President Higgins received an honorary degree of Doctor of Laws at the University of Edinburgh.
